Explain how to distinguish different species by their DNA.
DNA analysis can be used to distinguish different species by comparing specific regions of their DNA sequences.
To distinguish different species by their DNA, scientists primarily focus on comparing specific regions of the DNA sequences that are highly variable among species. One commonly used region is the mitochondrial DNA (mtDNA), which is inherited maternally and has a higher mutation rate compared to nuclear DNA. Another region is the ribosomal RNA genes (rRNA), which exhibit variations among species.
The process typically involves extracting DNA samples from different organisms, isolating the target region of interest, and sequencing the DNA to determine the nucleotide sequence. The sequences obtained from different species are then compared to identify differences and similarities.
These differences can be used to create DNA profiles or genetic markers specific to each species. Advanced techniques such as DNA barcoding or whole-genome sequencing can provide more comprehensive information and aid in species identification.
By comparing DNA sequences, scientists can uncover genetic variations unique to different species, allowing them to distinguish and classify organisms accurately. This information is valuable in various fields, including taxonomy, conservation biology, forensic science, and evolutionary research.
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identify the structural components of the autonomic plexuses and ganglia.
The autonomic plexuses and ganglia are the structural components of the autonomic nervous system. The autonomic nervous system is responsible for controlling involuntary functions, such as heart rate, breathing, and digestion.
The autonomic plexuses are networks of nerves that connect the spinal cord to the organs and tissues of the body. The ganglia are clusters of nerve cells that are located along the autonomic plexuses.
The autonomic plexuses and ganglia are responsible for carrying messages from the brain to the organs and tissues of the body. These messages control the function of the organs and tissues, such as heart rate, breathing, and digestion.
The autonomic plexuses and ganglia are divided into two main divisions: the sympathetic nervous system and the parasympathetic nervous system.
The sympathetic nervous system is responsible for the "fight-or-flight" response. When the sympathetic nervous system is activated, it causes the heart rate to increase, the breathing to become faster, and the pupils to dilate. This prepares the body to either fight or flee from danger.
The parasympathetic nervous system is responsible for the "rest-and-digest" response. When the parasympathetic nervous system is activated, it causes the heart rate to slow down, the breathing to become slower, and the pupils to constrict. This allows the body to rest and digest food.
The autonomic plexuses and ganglia are an important part of the autonomic nervous system. They are responsible for carrying messages from the brain to the organs and tissues of the body, and they control the function of these organs and tissues.
Here are some of the structural components of the autonomic plexuses and ganglia:
Nerve fibers: These are the long, thin cells that make up the nerves. They carry messages from the brain to the organs and tissues of the body.
Ganglia: These are clusters of nerve cells that are located along the autonomic plexuses. They relay messages between the nerve fibers.
Plexuses: These are networks of nerves that connect the spinal cord to the organs and tissues of the body.
Sympathetic nervous system: This is the division of the autonomic nervous system that is responsible for the "fight-or-flight" response.
Parasympathetic nervous system: This is the division of the autonomic nervous system that is responsible for the "rest-and-digest" response.
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Other than phosphocreatine breakdown, the fastest way to resupply atp to a muscle is:_________
The quickest way to provide ATP to working muscles is through anaerobic glycolysis.
Anaerobic glycolysis: What does it do?As each glucose molecule yields two ATP, glycolysis offers a direct method of generating energy in the absence of oxygen. Anaerobic glycolysis is the term used to describe the process of breaking down glucose without the presence of oxygen.
Anaerobic glycolysis takes place where?One 6 carbon glucose molecule undergoes glycolysis in the cytoplasm, where it is oxidised to produce two 3 carbon pyruvate molecules.
Pyruvate's fate is determined by whether or not the cells have mitochondria and oxygen.
Why is phosphocreatine required by muscles?The requirement to regenerate ATP is critical because the muscles' finite supply of ATP is consumed during muscle activity very quickly.
The molecule creatine phosphate is one method by which this ATP supply is renewed (or phosphocreatine).
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aamc which of the following observations would invalidate the unit membrane model?a.when a thin section of membrane is observed using a microscope at high magnification, two layers of phospholipid heads are observed.b.thermodynamic measurements indicate that the phospholipid heads are exposed to water.c.when a membrane is frozen and then split from surface to surface, proteins are observed within the hydrocarbon chains.d.thermodynamic measurements indicate that the phospholipid tails are hidden inside the membrane, away from exposure to water.
The observation that would invalidate the unit membrane model is option A, which states that when a thin section of membrane is observed using a microscope at high magnification, two layers of phospholipid heads are observed.
The unit membrane model proposes that the membrane is composed of a single layer of phospholipids with proteins embedded in it, and this observation contradicts that model. Options B, C, and D are all consistent with the unit membrane model and do not invalidate it.
Based on the given terms, the observation that would invalidate the unit membrane model is: c. when a membrane is frozen and then split from surface to surface, proteins are observed within the hydrocarbon chains.
This contradicts the unit membrane model, which proposes a continuous lipid bilayer with proteins on the surface, not embedded within the hydrocarbon chains.
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Which pattern of inheritance would explain the different fur color in the related dogs?
Answer:
B/b alleles.
from a presentation
Question 3 1 pts Which of the following receptor signaling pathways use phosphorylation to cause exposure of a NLS. so that a signaling protein can be targeted to the nucleus ? 1 TNF-alpha signaling II RTK Signaling III TGF-beta signaling IV Cytokine signaling OLI, I and IV O II, III and IV O Lill and IV OLII and IV Oll and in
The receptor signaling pathways that use phosphorylation to cause exposure of a NLS. so that a signaling protein can be targeted to the nucleus are: RTK Signaling, TGF-beta signaling, and Cytokine signaling. The correct option is II, III, and IV.
Receptor signaling pathways use phosphorylation to cause exposure of a NLS, so that a signaling protein can be targeted to the nucleus. It is used for signal transduction inside cells. It allows cells to identify and respond to changes in the environment by activating a series of phosphorylation reactions that modify the activity of proteins involved in cellular signaling.
Phosphorylation and dephosphorylation are two of the most important protein modifications in cells. The addition of a phosphate group to a protein can significantly alter its activity and interaction with other proteins, thus changing the outcome of a signaling event.
Intracellular signaling pathways mediated by a wide range of receptors are essential for a variety of cellular processes, including proliferation, differentiation, metabolism, and survival. Therefore, understanding the signaling pathways is critical to developing therapeutic strategies for the prevention and treatment of human diseases.
The major types of receptor signaling pathways are as follows:
I) TNF-alpha signaling
II) RTK signaling
III) TGF-beta signaling
IV) Cytokine signaling
Therefore, the receptor signaling pathways that use phosphorylation to cause exposure of an NLS so that a signaling protein can be targeted to the nucleus are II, III, and IV.
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Species whose roles have a large effect on the types and abundance of other species in an ecosystem are called ________ species?
Answer:Keystone Species
Explanation:
A keystone species is an organism that helps define an entire ecosystem. Without its keystone species, the ecosystem would be dramatically different or cease to exist altogether.
THANKS...DONT FORGET TO HEART IN RATE 5 STAR....
can any of the skeletal material be used to determine the biological sex of the victim(s)? if so, which bone(s)?
Yes, skeletal material can be used to determine the biological sex of the victim. The skeletal material that can be used to determine the biological sex of the victim includes the skull, pelvis, and long bones such as the femur.
The determination of the sex of a victim from skeletal remains is important in forensic investigations where the identity of a victim cannot be established by other means such as identification documents, fingerprints, or DNA analysis. Sex determination is crucial to develop a biological profile of the victim, which can provide important information to solve the case and help in the identification of the victim.
The skeletal material that can be used to determine the biological sex of the victim includes the skull, pelvis, and long bones such as the femur. The skull contains several features that can be used to determine the sex of the victim such as the shape of the skull and size of the mandible. For example, male skulls are usually larger and more robust than female skulls.
The pelvis is another bone that can be used to determine the biological sex of the victim. The pelvis is generally wider in females to accommodate childbirth and is more narrow in males. Furthermore, the pelvis bone has several features that can indicate the sex of the victim, such as the subpubic angle which is greater in females.
The long bones of the body can also be used to determine the sex of the victim. The femur, for example, has features such as the shape of the bone and the size of the head and neck, which can indicate the sex of the victim.
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a lin-3 loss-of-function mutant with a vulva-less phenotype was mutagenized. based on your knowledge of the genetic pathway, what types of mutations will suppress the vulva-less phenotype?
A mutation in let-23 or in any downstream genes in the lin-3 pathway can suppress the vulva-less phenotype in the lin-3 loss-of-function mutant.
The lin-3 pathway is responsible for inducing vulval development in C. elegans. In a lin-3 loss-of-function mutant, vulval development is suppressed, resulting in a vulva-less phenotype. However, mutations in let-23 or in any downstream genes in the lin-3 pathway can suppress this phenotype. Let-23 is a receptor tyrosine kinase that acts downstream of lin-3 to activate the ras/raf/MAPK pathway, which ultimately leads to vulval induction.
Mutations in let-23 or any of the downstream genes in this pathway can bypass the need for lin-3 and still induce vulval development. Thus, a lin-3 loss-of-function mutant with a vulva-less phenotype can be rescued by mutations in let-23 or downstream genes in the lin-3 pathway.
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If a transmembrane domain of protein contains beta-sheet structure, the overall structure of the transmembrane portion is likely a________. a) beta-barrel. b) beta-tube. c) beta-turn. d) beta-helix.
If a transmembrane domain of protein contains beta-sheet structure, the overall structure of the transmembrane portion is likely a beta-barrel.
The transmembrane domain of membrane proteins is a crucial domain that crosses the hydrophobic phospholipid bilayer of the membrane. The transmembrane domain is hydrophobic because it's composed of nonpolar amino acid residues, which are essential for crossing the membrane.
There are two forms of transmembrane domains: alpha-helical transmembrane domains and beta-barrel transmembrane domains, depending on their structural features. The transmembrane domain of alpha-helical proteins is an alpha-helix that runs through the membrane.The transmembrane domains of beta-barrel proteins, on the other hand, are beta-sheet structures that create a barrel-like shape by interacting with one another.
Therefore, if a transmembrane domain of protein contains beta-sheet structure, the overall structure of the transmembrane portion is likely to be a beta-barrel.
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Two noncellular agents, smaller than viruses, are infectious RNA strands called ___ and infectious proteins called ___.
Two noncellular agents, smaller than viruses, are infectious RNA strands called virioids and infectious proteins called prions.
Virioids are irresistible specialists that comprise just of bare RNA with next to no defensive layer, for example, a protein coat. Viroids contaminate plants and are reproduced to the detriment of the host cell. Viroid genomes are little single-stranded circles of RNA that are just 250-400 bases in length.
A prion is a "proteinaceous infectious particle," a name that was abbreviated to "prion" simply a protein. Prions are proteins that can attack cells and some way or another direct their own duplication, making a greater amount of the separated proteins. Prions can enter the cerebrum through contamination, or they can emerge from mutation in the gene that encodes the protein.
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Write the difference between capture fishing and culture fishing
Answer:
Explanation:
75dtc7vtufvtfvuyvyv nerd
Describe what the town looked like when the Once-ler first arrived in his
wagon.
In the movie Lorax
When the Once-ler first arrived in his wagon, the town looks like very large surrounded by trees called Truffula trees.
What are the conditions of town look like?A Town looks like very huge with an enormous number of trees. Bears are randomly walking around the trees and eating truffula fruits.
Fishes were lived in a pond, a place called glorious where swamee swans were found.
Therefore, when the Once-ler first arrived in his wagon, the town looks like very large surrounded by trees called Truffula trees.
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Nongonococcal urethritis is most often caused by all of the following EXCEPT
A) Mycoplasma homini.
B) Neisseria gonorrhoeae.
C) Trichomonas vaginalis.
D) streptococci.
E) Candida albicans.
Nongonococcal urethritis is most often caused by all of the following EXCEPT: Neisseria gonorrhoeae.
The correct answer is B) Neisseria gonorrhoeae. Nongonococcal urethritis (NGU) is a sexually transmitted infection that is caused by a variety of bacteria, viruses, and other organisms. Mycoplasma hominis is one of the most common causes of NGU, along with Chlamydia trachomatis. Streptococci can also cause NGU, although it is less common. Trichomonas vaginalis and Candida albicans are not typically associated with NGU.
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label the pyramid levels in model 1 with following:primary producers, primary consumers, secondary consumers, ann tertiary consumers.
Answer:
ecological pyramid
Explanation:
list out the significance of Crop improvement.
Answer:
Plant breeders create crop varieties that can resist harsh circumstances such as cold, drought, and wind by tailoring the variety's development cycle to the available growing season.
Explanation:
what is enviroment and its importance?
Hi! Your answer is below! I made it as brief as I could.
There are many definitions, meanings, and interpretations for the word "environment," which is frequently used. What is meant by the word "environment"? In common usage, the word "environment" might simply mean "nature" to some people, which refers to the natural environment and all of its non-human qualities, traits, and processes. For those individuals, the concept of the environment is frequently strongly tied to ideas of wilderness and pristine landscapes that have not been affected by human activity, or have only been minimally affected. For some others, however, the term "environment" also contains certain human components. Many individuals would consider pastoral and agricultural landscapes to be a component of the environment, while others are even more comprehensive and believe that the environment includes all features of the earth's surface, including metropolitan regions. Therefore, in common usage, the concept of the "environment" is linked to a variety of assumptions and attitudes that are frequently unsaid but may be firmly held. All of these applications, however, share a common underlying presumption: that humans and the "environment" have some sort of relationship. As a result, the environment serves as the "backdrop" to different aspects of human history, including the habitats and resources that people use, the "hinterland" that surrounds habitations, and the "wilderness" that people have not yet tamed or subjugated.
The word "environment" simply means "surroundings" (environs) in its most basic meaning, therefore any other entity that a person, object, element, or system is surrounded by is considered a part of that entity's environment. Individuals, things, components, and systems, however, seldom live in isolation in reality; rather, they frequently engage in a variety of interactions with the entities around them. Therefore, conceptualizing the "environment" without incorporating some sort of relational idea is not especially helpful. People, things, elements, and systems all have an impact on and are in turn affected by their environment. In certain instances, the networks of connections between various entities may be enormous and extremely complicated. As a result, the "environment" may be thought of as a "space" or "field" where networks of connections, interactions, and relationships between entities take place. Such a conceptualization will be recognizable to individuals who have studied ecology because ecologists are interested in both the biotic (living) and abiotic (non-living) components of environmental systems, particularly their interactions. In reality, the terms "environment" and "ecosystem," which refer to a community of interacting species and their physical surroundings, are sometimes used synonymously in ecological contexts. Since many environmental problems have resulted from the disruption or degradation of one environmental system as a result of changes made to another, whether unintentionally or on purpose, the idea of interconnectedness is crucial to environmental science and management.
The environment is made up of all things, both living and nonliving, that affect people. It is essential to the operation of our daily life. There was the environment/nature and its magnificent species even before there was a human home. Every species, whether on land or in the sea, coexisted peacefully. There was unrest following the start of human civilization and industry. Humans started using the environment as a tool to achieve goals without thinking about the consequences of their actions or the respect they should have for the supporter of life on Earth.
Here are a few justifications on why the environment is crucial:
We receive both renewable and non-renewable materials from the environment.Without natural resources like the sun, moon, water, land, and air, human existence would not be conceivable.Genetic diversity and variation are provided by the environment, which are necessary for life to flourish.The environment aids in the disposal of waste produced during the production and consumption of products and services, which is generally in the form of rubbish.Our environment includes the mountains, rivers, lakes, deserts, and other natural areas that we appreciate.Thank you,
Eddie
a man has brown eyes. he marries a heterozygous woman with blue eyes. if blue dominates, what is the genotype?
Answer:
AA
Explanation:
So blue is dominate so it would have to have a genotype with both letters capitalized indicating it's dominant so example: AA
true/false: ventral means "toward the back" and dorsal means "toward the stomach."
False. The terms "ventral" and "dorsal" have opposite meanings to the provided statement. "Ventral" refers to "toward the stomach" or "front," while "dorsal" refers to "toward the back" or "rear."
The statement is incorrect. In anatomical and biological contexts, the terms "ventral" and "dorsal" are used to describe the orientation or position of an organism or body part. "Ventral" refers to the front or belly side of an organism, while "dorsal" refers to the back or rear side. For example, in humans, the ventral side is the front side, facing the stomach or abdomen. The chest and abdomen are considered ventral regions. Conversely, the dorsal side is the back side, facing away from the stomach. The back and spine are examples of dorsal regions. Therefore, it is important to remember that "ventral" means "toward the stomach" or "front," while "dorsal" means "toward the back" or "rear" when describing the orientation or position of an organism or body part.
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100 POINTS
I am asking 2 questions because im giving so many points...
1. Describe the first hypothesis that scientists have about blindness in the Mexican tetra. Be sure to discuss pleiotropy in your answer.\
2. One effect of the Hedgehog gene is to make cave tetras go blind. What is another effect it might have?
Answer:
these are odd questions....
Explanation:
1. they are curious about how they get blind
2. the quills
Answer:
1.The first hypothesis is that blindness gives the tetra some sort of evolutionary advantage. That advantage might be the result of pleiotropy, which is when multiple effects are caused by the same mutation in one gene. Scientists think that the mutation that causes blindness in the tetra might also cause a "seemingly unrelated change in the fish that is beneficial."
2. Another effect it might have is to improve cave tetras' sense of smell.
Explanation:
i said so
Explain how shape is important in insulin's ability to send messages to
cells about blood glucose levels.
The shape of the receptor is essential in insulin's ability to send messages to cells about blood glucose levels and glucose out of your bloodstream and carry it into cells throughout your body. The cells then utilise the glucose for energy and keep the extra glucose in liver, muscles, and fat tissue.
Which part of this negative feedback loop is the stimulus ?A negative feedback loop takes place in the field of biology specifically in processes of homeostasis, when the product of the reaction leads to a decrease in the overall process.
Through this, the stimulus of a negative feedback loop brings a system to bring system to equilibrium or stability.
In this provided case increase in glucose level in the blood is acts as the stimulus to release the insulin hormone that return the blood glucose level back to normal.
Thus, his could be the answer.
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You are a doctor in the emergency room. A runner comes in after completing a marathon and is dehydrated. You know the runner needs fluid through an IV but you have to decide between three options: A. Water (0% salt) B. Saline (water with 0.9 % salt) C. Saline (water with 2% salt)
Answer:
The correct option is B
Explanation:
Normal saline (or 0.9% of salt in water) is a common therapy used in hydrating the body; usually during sickness (and sometimes after an exhaustive exercise). This normal saline helps in maintaining electrolyte balance and prevent fluid shift between intravascular, intracellular, and interstitial spaces in the runner's body.
An increase in this solute concentration of the salt might lead to an imbalance in the body of the runner which could lead to some other problem for the runner.
through green community practices the members can propose which projects
The members can propose:
Sustainable Purchasing.Electronic Management.Transportation.pollinator protection.Waste Diversion.Pollution prevention.A good way to start is to save water drive less walking use less energy buy recycled products eat locally grown vegetables and go green to combat air pollution. These include joining organizations generating less waste and planting more trees.
You are one of twenty-four companies accredited by the United Nations to provide advisory services on climate change. The main goals of the green initiative include offsetting greenhouse gas emissions from human activities and reforestation projects in riparian areas in need of restoration. They act as catalysts for expanding social and economic opportunities and improving quality of life.
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What do homologous structures like arm bones show about the ancestry of two species like alligators and bats?
Analogous structures demonstrate that identical selective pressures might result in similar adaptations, whereas homologous structures indicate evidence for shared ancestry. biological molecules' distinctions and similarities.
What does the homology of two species' structures reveal?If two or more species have similar physical characteristics, it's possible that all of them inherited them from a common ancestor. Homologous structures are traits that are similar because they have a common ancestor. A structural homology is the comparable bone arrangement in the forelimbs of humans, birds, and whales.
What two animals have limbs that resemble human arms?With a large upper "arm" bone and a smaller lower "leg" bone, the flipper of a whale, the wing of a bat, and the leg of a cat are all strikingly similar to the human arm.
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An enzyme-catalyzed reaction was run at five different temperatures (trials 1-5). The
results are shown in the data table above. Based on the data, what is the optimal
temperature at which this enzyme functions? (2 points)
O 20°C
O 40°C
O 60°C
O 70°C
Answer:
Maybe 40°C
Explanation:
because at higher temperatures the enzymes get denatured lost their shapes so maybe its 40°C
i hope it's right if not so advance sorry :)
Some cars are hybrid automobiles most automobiles are powered only by gasoline engines, and a few are powered by electric motors. In a hybrid automobile, there are two sources of power: a gasoline engine and an electric motor. Give an example of a trait that Mendel studied in hybrids.
One example of a trait that Mendel studied in hybrids is flower color in pea plants.
Gregor Mendel, known as the father of modern genetics, conducted extensive experiments with pea plants in the mid-19th century. He studied the inheritance patterns of various traits, including flower color, in these plants.
Pea plants have different variants for flower color, such as purple and white. Mendel discovered that certain traits are inherited in a predictable manner, and he used hybrids to study these patterns.
In the case of flower color, Mendel crossed pea plants with purple flowers (genotype PP) with pea plants with white flowers (genotype pp).
The resulting hybrids, known as the first filial generation (F1), all had purple flowers. However, when these F1 hybrids were self-fertilized or crossed with other F1 hybrids, Mendel observed a 3:1 ratio of purple to white flowers in the second filial generation (F2).
This indicated that the trait for flower color followed a specific pattern of inheritance, later known as Mendelian inheritance.
By studying traits like flower color in hybrids, Mendel was able to establish the fundamental principles of inheritance, providing the basis for modern genetics.
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PLZZZZZZZZZZZZZZZZ HELPPPPP
1. What are the primary organs of the urinary system?
A. kidneys
B. lungs
C. blood vessels
D. hormone secreting glands
2. Which structure in the nephron carries out the process of filtration?
A. glomerulus
B. collecting duct
C. loop of Henle
D. proximal convoluted tubule
3. What is the name for the fluid that collects in Bowman's capsule?
A. blood plasma
B. filtrate
C. urine
D. None of these choices are correct.
4. Which part of the nephron carries out most of the reabsorption of nutrients into the blood?
A. Bowman's capsule
B. distal convoluted tubule
C. loop of Henle
D. proximal convoluted tubule
5. Which type of pathogen is not made up of cells?
A. animal pathogens
B. bacteria
C. fungi
D. protozoa
E. viruses
6. Which type of pathogen is made up of a single prokarytotic cell?
A. animal pathogens
B. bacteria
C. fungi
D. protozoa
E. viruses
7. Which of these pathogens is made up of eukaryotic cells?
A. animal pathogens
B. fungi
C. protozoa
D. All of these choices are correct.
8. What is the only type of pathogen that can be treated with antibiotics?
A. animal pathogens
B. bacteria
C. fungi
D. protozoa
E. viruses
9. Which of the following is a part of the non-specific immunity?
A. B lymphocytes
B. plasma cells
C. skin
D. T lymphocytes
10. Which of these cells is responsible for antibody-mediated immunity?
A. B lymphocyte
B. Helper T lymphocyte
C. Killer T lymphocyte
D. macrophage
11. Which of these cells is responsible for cell-mediated immunity?
A. B lymphocyte
B. plasma cell
C. T lymphocyte
D. phagocyte
12. Which of the following is true of antibodies?
A. They are made by B lymphocytes.
B. They are made by Helper T lymphocytes.
C. They are made by Killer T lymphocytes.
D. They are made by macrophages.
13. Which cells produce chemicals that cause the other parts of the immune system to function?
A. B lymphocytes
B. Helper T lymphocytes
C. Killer T lymphocytes
D. plasma cells
14. Which of the following remain after recovering from an infection and provide immunity?
A. memory cells
B. phagocytes
C. macrophages
D. plasma cells
15. Which of the following immune system cells are the hosts for HIV?
A. B lymphocytes
B. Helper T lymphocytes
C. Killer T lymphocytes
D. plasma cells
16. Which of these is an example of natural active immunity?
A. immunity after receiving a vaccination
B. immunity after recovering from a pathogen infection
C. a baby's immunity resulting from antibodies from its mother
D. None of these choices is correct.
17. Which of the following best explains how vaccinations result in ACTIVE immunity?
A. The vaccination causes a primary immune response and memory cells are retained for life.
B. The vaccination contains antibodies.
C. The vaccination contains lymphocytes from horses.
D. None of these choices is correct.
18. Which of the following practices contributes to bacteria that have resistance to antibiotics?
A. Prescribing antibiotics for diseases that are not caused by bacteria.
B. Self prescribing of antibiotics by people whenever they are ill.
C. Patients stop taking prescribed antibiotics when they begin to feel better instead of finishing the prescription.
D. All of these choices are correct.
19. Which of the following can result in an endemic disease becoming an epidemic?
A. The health of the host population is reduced by overcrowding or stress.
B. There is a drastic increase in the population of the vector of the pathogen.
C. The pathogen mutates to a more dangerous form.
D. All of these choices are correct.
20. What is the name for a disease outbreak that spans several continents or the entire world?
A. an endemic
B. an epidemic
C. a pandemic
D. All of these choices are correct.
1. A
2. A
3. B
4. D
5. E
6. B
7. D
8. B (not sure)
9. C
10. A
11. C
12. A
13. B
14. A
15. C
16. B
17. D
18. C
19. D
20. C
Which cellular process takes place in the nucleus of eukaryotic cells?
a. The synthesis of new proteins
b. The replication of nucleic acids
c. The breakdown of waste material
d. The conversion of radiant energy to glucose
Answer: The nucleus is a DNA-containing cell organelle that drives ribosome and protein production. Thus, option A is correct.
Explanation:
A nucleus is a hereditary unit of a cell that is membrane-bound and serves a variety of tasks; it is not merely a storing room for DNA but also the locus of several vital cellular activities.
1.Primarily, one's DNA can be duplicated in the nucleus. This process, known as DNA Replication, creates an exact copy of the DNA.
2.The initial stage in the cellular division is to make two identical clones of the body or host, after which each new cell will receive its own set of instructions.
3.Furthermore, the nucleus is where transcription occurs. Transcription produces many forms of RNA from DNA. Transcription would be similar to making copies of particular portions of the human body's instructions, which could then be pushed out and read by the remaining cells.
The primary law of biology is that DNA gets replicated into RNA, which is subsequently translated into proteins.
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What are some obstacles you would face if you dug a hole through the center of the earth and then fell through the hole? Please help!!
Answer: The farther you go down the hotter it gets because earth's core is very very hot
Explanation:
A student is creating a T chart of prokaryotic vs eukaryotic cells
T chart of prokaryotic cell vs eukaryotic cell.
Prokaryotic cell size is generally small ( 0.5-10um ).Nuclear region is not surrounded by nuclear membrane. Membrane bound organelles such as mitochondria, Lysosomes, endoplasmic reticulum are absent nucleus is absent. cell division is by fission or budding ( but no mitosis ).they always have single chromosome. DNA is circular and lies free in the cytoplasm. DNA is nàked( not associated with proteins or RNA to form chromosome) eg - found in PPLO bacteria and blue green algae. Eukaryotic cell they are larget in size (1-100um)Nuclear region is surrounded by a nuclear membrane. all the membrane bound organelles are present. nucleus present. cell diviis mitotic or meiotic.they have more than one chromosome. DNA is linear and contained in a nucleus. DNA is associated with proteins and RNA to form chromosomes. e.g found in plants and animals other than PPLO and blue green algae.