Answer: An organism is basically a living thing that reacts to stimuli, grow, adapt, reproduce, and maintain homeostasis. These include eukaryotes and prokaryotes
Explanation:
Carbon atoms have four electrons in their outer shell. This means that a single carbon atom can form up to _______ bonds with other atoms.
Answer:
four
Explanation:
Carbon atoms have four electrons in their outer shell. So, it exhibits tetravalency & thus, a single carbon atom can form a maximum of four (4) bonds with other atoms
If everyone on the planet used the same amount of resources as an average American, what percent of the Earth would
need to be used to support everyone?
A. 75%
B. 50%
C. 150%
D. 200%
Answer:
D. 200%
Explanation:
While Americans constitute the 5% of the world population, they use around the 24% of the world's energy.
Then, if the 100% of the population were like the Americans, we have:
5%*x = 100%
x = 100%/5% = 20
the whole population is 20 times the population of the US, then the total energy used is 20 times the energy used in the US.
Then the energy that the 100% of the population would use is equal to:
20*24% = 480%
So we actually would need like 5 Earths.
The option is 200%
.write the difference between
a.Soil formation and Soil erosion
b.Soil pollution and Soil profile
A. In soil erosion, the soil is carried away from by the wind or water from the top layer of the ground. Soil formation is making soil. It can be by the deposition of the soil from water or wind.
Examples
Single Units
Elements
Functions
Carbohydrates Lipids
glucose
fructose
galactose
Macromoleculés
fatty acids
glycerol
Nucleic Acids
carbon
hydrogen
oxygen
nitrogen
phosphorus
Proteins
structure
control reactions
regulation
fight disease
receptors
what is the correct order of protein production?
1) ribosome
2) endoplasmic reticulum
3) secretory vesicles
4) golgy apparatus
a) 1,2,3,4
b) 2,4,3,1
c) 1,2,4,3
d) 3,2,4,1
Answer:
The correct order of protein production is:
c) 1,2,4,3
Ribosome: Protein synthesis begins in the ribosomes, which are located either in the cytoplasm or attached to the endoplasmic reticulum.
Endoplasmic Reticulum: After the initial stages of protein synthesis in the ribosomes, the newly synthesized protein is transported into the endoplasmic reticulum (ER) for further processing and modification.
Golgi Apparatus: The proteins synthesized in the ER undergo further processing and modifications in the Golgi apparatus. This includes sorting, packaging, and modifying the proteins to their final functional forms.
Secretory Vesicles: Once the proteins are properly processed and modified in the Golgi apparatus, they are packaged into secretory vesicles. These vesicles transport the proteins to their destination, such as the plasma membrane for secretion outside the cell.
Therefore, the correct order is 1, 2, 4, 3.
Answer:
The correct order of protein production is ribosome, endoplasmic reticulum, Golgi apparatus, and secretory vesicles. So the correct answer would be c) 1,2,4,3.
Many proteins destined for the endoplasmic reticulum, the Golgi apparatus, lysosomes, the plasma membrane, and secretion from the cell are synthesized on ribosomes that are bound to the membrane of the endoplasmic reticulum. The Golgi apparatus then distributes these proteins and lipids that it receives from the ER.
Which best compares a molecule that has a trigonal planar shape with one that has a trigonal pyramidal shape?
They both contain three lone pairs of electrons around the central atom.
They both contain three atoms around the central atom.
The central atom of the trigonal planar molecule has two lone pairs around it, but the central atom of the trigonal pyramidal molecule has only one.
The central atom of the trigonal planar molecule has two atoms around it, but the central atom of the trigonal pyramidal molecule has only one.
The statement that best compares a molecule that has a trigonal planar shape with one that has a trigonal pyramidal shape is as follows: They both contain three atoms around the central atom (option B).
What is hybridisation in chemistry?Hybridisation is the linear combination of atomic orbitals in a molecule to form hybrid orbitals. A chemical compound can possess either a trigonal pyramidal shape or trigonal planar shape.
Trigonal pyramidal is a chemical form that occurs when the central atom in the molecule has three bonds and one lone pair. Sp³ hybridization occurs at the centre atom of molecules with tetrahedral electron pair geometries. The molecule ammonia has a trigonal pyramidal shape.
A trigonal planar molecular geometry compound has a centre atom that is bonded to three additional atoms or groups. The three groups to which it is connected form a triangle around the core atom, with bond angles of 120 degrees, because it has no lone pairs of electron pairs.
The major difference between these two molecular geometry is that trigonal planar geometry has no lone pair of electrons while trigonal pyramidal geometry has lone pair of electrons.
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In some forests are cleared by burning .This produces carbon dioxide and ash.
(a) Outline the environment effects of am increase in carbon dioxide in the atmosphere as a result of burning forests.
(b) The ash helps crops to grow bcuz it is rich in minerals, such as magnesium ions ,but it is deficient in nitrate ions.
Explain why nitrate ions and and magnesium ions are important for plants.
Answer:
B. The ash helps crops to grow because it is rich in minerals, such as magnesium ions, but it is deficient in nitrate ions.
Explanation:
After the forest is being burned, ash and carbon dioxide increase on the surface of the ground. It is good for the plant to grow because the plant uses carbon dioxide for photosynthesis, and its root absorbs energy from the ground where ash is very good for the plant to grow.
Biology I Mid-Year-Assessment (2020-2021) Question. 1-11
Ww.
In a breed of dog, the gene for black fur is dominant and the gene for brown but is receive Two dogs with black but are bred.
The dog received a mutated gene.
The dog only received one gene for fur color
The dog received two recessive genes for brown fur
The dog received one gene for brown fur and one gene for black fur
O
In a breed of dog, the gene for black fur is dominant and the gene for brown but is receive Two dogs with black but are bred.The dog only received one gene for fur color
Dogs with heterozygosity (dogs with one copy of the brown gene and one copy of the black allele) look black. Black and brown do not mix because the black allele conceals the brown allele. The black allele is hence dominant over the brown allele. Keeping this in mind, dominant alleles can mask recessive alleles. A dog will look black if just one dominant allele is present. The black allele has a recessive effect on the brown allele. For the dog to appear brown, two copies of the recessive brown gene must exist. Codominance is the term used when both alleles are dominant. Because all alleles are expressed equally, the feature is the consequence.
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DNA sequence analysis shows that whales _____ A. have almost identical genomes. B. have less sequence homology between them than horses and cows. C. have a mutation in their limb genes that prevents them from producing limbs at all. D. have more sequence homology with each other than they do with other mammals.
DNA sequence analysis shows that whales have almost identical genomes A.
What is DNA sequence analysis ?DNA sequence analysis can be defined as the process of subjecting a DNA, RNA sequence to any of a wide range of analytical methods to understand its features or evolution. Sequences analysis from different organisms can be compared for evolutionary analysis between species, DNA sequencing can reveal changes in a gene that may cause a disease. One of the common type of DNA profiling today for criminal cases and other types of forensic uses is called "STR" (short tandem repeat) analysis.
Therefore DNA sequence analysis can be used to reveal changes in a gene that may cause a disease.
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Identify the correct answer to complete the following statement. Formin nucleates the growth of parallel actin bundles in the cell. Additionally, myosin motor activity is positively regulated by phosphorylation. The monomeric g protein rhoa is important in cytokinesis, because it directly or indirectly ….
The monomeric G protein RhoA is important in cytokinesis, because it directly or indirectly regulates actin and myosin, and is involved in the formation of the contractile ring.
The monomeric G protein RhoA plays a crucial role in cytokinesis, which is the process by which a cell divides into two identical daughter cells. During cytokinesis, a contractile ring is formed, which constricts and separates the two daughter cells. The contractile ring is composed of actin and myosin filaments, which are responsible for generating the force required for cell division. RhoA is involved in the formation of the contractile ring, as it directly or indirectly regulates actin and myosin. Specifically, RhoA activates the formin protein, which nucleates the growth of parallel actin bundles in the cell. This leads to the formation of the contractile ring around the cell.RhoA also plays a role in the regulation of myosin motor activity, which is necessary for cytokinesis. Myosin motor activity is positively regulated by phosphorylation, which is the addition of a phosphate group to a protein molecule. RhoA has been shown to promote myosin phosphorylation, thereby increasing myosin motor activity and promoting cytokinesis.
RhoA is a monomeric G protein that is important in cytokinesis because it regulates actin and myosin, and is involved in the formation of the contractile ring. RhoA activates the formin protein, which nucleates the growth of parallel actin bundles in the cell, and promotes myosin phosphorylation, thereby increasing myosin motor activity. These functions of RhoA are essential for successful cell division.
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What do all members of a biological species have in common? Question 1 options: They are members of the same population. They can interbreed and produce fertile offspring. They have identical physical characteristics. They live in the same geographical location.
The correct answer is All members of a biological species have in common is that they can interbreed and produce fertile offspring.
It has a common gene pool, can interbreed to produce new offspring, can produce fertile offspring. It has a collection of gene variants. Species are separated from each other by zygotic events that cause differences in them.
What is biological species?The biological species have all in common that they can produce fertile offspring. For example Sturnella neglecta, Sturnella magna.
Hence concluded that all members of a biological species have in common they can interbreed and produce fertile offspring.
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are dandelions unisexual plants or bisexual plant
Answer:
bisexual
Explanation:
Heterogamous flowerheads are where the heads comprise two differing sexes of florets, examples being the ray (which are either unisexual or neuter) and disc florets (which are usually usually bisexual) belonging to the Asteraceae (Dandelion & Daisy family).
superfractor va, an engineered factor v molecule, effectively reduces bleeding and acute coagulopathy in mouse models of trauma and shock. the american society of hematology
Here, we looked into the potential for reducing traumatic bleeding and preventing or normalizing hemostasis parameters suggestive of acute traumatic coagulopathy (ATC), a process thought to be distinct from disseminated intravascular coagulation, through targeted intervention with an engineered factor FV variant (superFVa), resistant to inactivation by APC (DIC).
Traumatic bleeding is a leading cause of death and disability in the absence of particular treatments. A high mortality risk condition known as acute traumatic coagulopathy (ATC) is seen in 30 to 50 percent of individuals who also have bleeding. Activated protein C (APC), whose excessive production promotes the quick depletion of engineered factor FV variant and FVIII and hyperfibrinolysis, may play a part in the onset of ATC, according to recent studies.
Only mice who underwent both trauma and shock in the trauma/shock model acquired ATC, as shown by a large APTT extension (25.4 to 36.1 seconds), which was accompanied by a severe drop in engineered factor FV variant and FVIII, a minor reduction in fibrinogen, and no effect on FX or FII.
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Which of the following statements best describes the relationship between genes and their outcomes? F. Every gene influences a single trait. G. Similar genes produce the same outcome in every individual. H. Every gene can be linked to one specific, predictable outcome. I. The outcome of a gene is affected by the environment of the cells and the timing of gene expression.
Option I. The outcome of a gene is affected by the environment and timing of gene expression, not every gene influences a single trait.
The explanation that best portrays the connection among qualities and their results is I: the result of a quality is impacted by the climate of the cells and the planning of quality articulation. While qualities really do assume a part in deciding a singular's characteristics, it's anything but a basic balanced relationship. The declaration of qualities can be impacted by different elements, remembering the climate for which the phones are found, the planning of quality articulation during improvement, and communications with different qualities. Besides, a similar quality can have various results in various people, contingent upon hereditary and natural elements. In this manner, while qualities really do add to a singular's characteristics, their results are not very much unsurprising and can be impacted by various elements.
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List the parts of a visceral reflex arc .
A reflex arc consists of five components that, when combined, form a reflex loop:
Receptor for sensory information.Sensory neuron is a type of neuron.Center for integration.The motor neuron.The effector's target.The output of a visceral reflex is a two-step pathway that begins with a preganglionic fiber emerging from a lateral horn neuron in the spinal cord or a cranial nucleus neuron in the brain stem to a ganglion, followed by a postganglionic fiber projecting to a target effector.
The viscerosomatic reflex arc begins after visceral dysfunction (i.e., myocardial ischemia), which increases the propagation of action potentials along visceral afferent fibers that terminate in the dorsal gray matter of the spinal cord.
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cactus finches have long, pointed beaks. say the only source of food for cactus finches is cactus flowers. if a plant disease killed a large portion of the cacti on the galapagos islands, how would the population of cactus finches change? (1 point) responses the population of cactus finches would decrease because there would be more competition for food. the population of cactus finches would decrease because there would be more competition for food. the population of cactus finches would decrease because there would be less competition for food. the population of cactus finches would decrease because there would be less competition for food. the population of cactus finches would increase because there would more food available for each individual. the population of cactus finches would increase because there would more food available for each individual. the population of cactus finches would increase because there would be less food available for each individual.
The population of cactus finches would decrease because there would be less food available. Since the only source of food for cactus finches is cactus flowers, a disease that kills a large portion of the cacti on the Galapagos Islands would result in less food for the cactus finches.
As a result, the population of cactus finches would decrease because there would be less food available for each individual, leading to more competition for the remaining food resources. The decrease in the population size would be due to a decrease in the carrying capacity of the environment, which is determined by the availability of resources.
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discuss the two growth patterns that describe the changes in body proportions as a child grows.
There are two growth patterns that describe the changes in body proportions as a child grows: the cephalocaudal pattern and the proximodistal pattern.
The cephalocaudal pattern describes the growth that occurs from head to toe. During infancy, a baby's head is proportionally larger than the rest of their body. However, as the child grows, their body catches up, and by adulthood, their body is proportionate. The proximodistal pattern describes the growth that occurs from the center of the body outward. In other words, the child's trunk grows first, followed by their limbs.
For example, a baby's arms and legs are proportionally shorter in relation to their torso. However, as the child grows, their limbs lengthen and become proportionate to their torso. These two growth patterns work together to shape a child's body proportions as they grow. It's important to keep in mind that every child grows at their own pace and that these patterns are simply general trends.
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Overshadows the other allele in the heterozygous state.
answer choices
dominant
recessive
The dominant allele overshadows the other allele in the heterozygous state.
A homozygous dominant genotype is an organism with two dominant alleles for a trait. This genotype is written as BB, taking the example of eye color. A heterozygous genotype is an organism with one dominant and one recessive allele. This genotype is written Bb in our example. A recessive allele is the kind of allele that is frequently hidden or overshadowed by the dominant allele. If a person has the recessive allele, that trait will only show up if they are homozygous for it.
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ALL cells have membrane-bound organelles.
O True
O False
Answer:
True
Explanation:
The cell membrane, also called the plasma membrane, is found in all cells and separates the interior of the cell from the outside environment. The cell membrane consists of a lipid bilayer that is semipermeable.
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Which claim is most likely to be based on pseudoscience A. The arrangement of the stars can bring you good luck B. The color of light from a star can tell you how old it is C. The planets in our solar system move around the sun D. The volume of gas will increase if you heat the gas
The arrangement of the stars can bring you good luck is most likely to be based on pseudoscience.
What is Pseudoscience?These are statements which seem factual but has no relationship with scientific methods.
Option A was chosen because there is no scientific proof that stars bring luck gto individuals.
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many cells make and use an enzyme, called catalase, to facilitate the decomposition of hydrogen peroxide (h2o2). the products of the decomposition are hydrogen (h2) and oxygen (o2).
The products of the decomposition are hydrogen \(H2\) and oxygen \(O2\) is \(H2O2\). Many cells make and use an enzyme, called catalyze to facilitate the decomposition of hydrogen peroxide.
What are enzymes?Enzymes are the biological catalyst that speed up the chemical reaction that carries out in the body. Enzymes has been protein by nature and there has number of the enzymes present in our body such as salivary amylase, pepsin, renin, lyases, lygases etc.
The main function of the enzyme has to make the metabolism fast as well as speed up the chemical reaction carried out in the body.
Therefore, The products of the decomposition are hydrogen \(H2\) and oxygen \(O2\) is \(H2O2\). Many cells make and use an enzyme, called catalyze to facilitate the decomposition of hydrogen peroxide.
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How many trophic levels can monkeys occupy in a food chain?
Answer:
A monkey can occupy two tropic levels in a food chain. These levels can be primary consumers or secondary consumers.
Answer:
two, because they eat plants and insects
Explanation:
cles is shown.
Turtle
Tiger
House cat
Ability
to purr
Retractable
claws
iento involves many body systems. A student made a partial list of the
Horse
Wolf
Sharp
Vertebral
column
Hair
teeth
Four
limbs
Based on the cladogram, the ancestral species most likely had-
A
a vertebral column
B
a vertebral column and hair
C
sharp teeth and retractable claws
D the ability to purr
From the cladogram, we can tell that the ancestral species most likely had a vertebral column.
What is a cladogram?The cladogram is a branched diagram that can be used to show the relationship between organisms. It can also be used to decode evolutionary relationships.
As such, from the cladogram, we can tell that the ancestral species most likely had a vertebral column.
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When Mendel crossed the pollen from a plant with green pods with a plant with yellow seed pods, all of the offspring had green seed pods. This told him that (type here) seed pods were dominant over (type here) seed pods.
Over yellow seed pods, green seed pods predominated.
In his research on the rules of inheritance, Austrian monk and botanist Gregor Mendel made this observation.
Mendel's studies on pea plants demonstrated that some characteristics, including the colour of seed pods, were governed by genes and could be passed down from one generation to the next. When two recessive genes were present, he discovered that some genes were dominant, which meant they would cover up the recessive gene's presence. All of the progeny in this experiment had green seed pods despite carrying a copy of the gene for yellow seed pods because the gene for green seed pods was dominant over the gene for yellow seed pods.
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One mutation inALAS2that is associated with protoporphyria is a four-nucleotide deletion. Theprotein expressed from the mutant allele is20amino acids shorter than the wild-type protein.
5.Which of the following best explains why a shortened protein is produced? TT
a)The mutation disrupts the start codon, preventing the ribosome from beginningtranslation.
b)The mutation introduces a premature stop codon, causing translation to end early.
c)The mutation changes the gene’s regulatory region, causing unregulated geneexpression.
d)The mutation affects posttranscriptional modifications by preventing the removal ofintrons
The best explanation for why a shortened protein is produced is option B: The mutation introduces a premature stop codon, causing translation to end early.
What is shortened protein?Shortened protein, also known as truncated protein, is a type of protein which has been modified by removing one or more of its amino acid residues. This process results in a shorter, modified protein which may have different properties from the original version.
A stop codon is a sequence of three nucleotides that signals the termination of translation. When a mutation introduces a premature stop codon in the gene sequence, the ribosome will read it and cease translation of the gene prematurely, resulting in a shortened protein.
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Sound science is based on one time ocurrences. True or false
Explain the difference between each of the following substitution mutations:
a. Silent mutation -
b. Missense mutation –
c. Nonsense. Please HELP
Answer: silent mutation: a nucleotide base in a codon is replaced with a different base BUT the resulting amino acid isn’t affected.
Missense mutation: similar to a silent mutation, the only difference is that the switch of the nucleotide DOES result in a DIFFERENT amino acid
Nonsense mutation: a nucleotide base is changed, but that change results in a premature stop of translation
(Remember that after transcription, you are left with a strand of mRNA that Is then translated into a protein. The mRNA is read in increments of three nucleotide bases (A,U,G, or C) which is called a codon. That codon makes a single amino acid, and a strand of amino acids makes a protein)
Which is not a stage of cellular respiration?
A) glycolysis
B) Krebs cycle
C) electron transport chain
D) Lactic and fermentation
Answer:
d?
Explanation:
Out of the four "ingredients for evolution" we talked about in class, which one provides all the raw material for evolutionary forces to act on? A. Mutation B. Selection C. Genetic Drift D. Gene Flow
The correct answer is A. Mutation.
Mutation provides all the raw material for evolutionary forces to act on. Mutations are random changes in an organism's genetic material (DNA). They can be caused by various factors such as errors during DNA replication, exposure to radiation or chemicals, or even spontaneous changes.
Mutations introduce new genetic variations into a population. These variations can lead to differences in traits among individuals. Evolutionary forces such as natural selection, genetic drift, and gene flow act upon these variations, determining their fate in a population over time.
Selection (B) refers to the process by which certain traits become more or less common in a population based on their impact on survival and reproduction. It acts on existing genetic variations but does not provide the raw material itself.
Genetic drift (C) is the random change in allele frequencies in a population due to chance events. It can lead to the loss of certain variations or fixation of others, but it does not create new genetic material.
Gene flow (D) is the movement of genes from one population to another through migration and interbreeding. While it can introduce new genetic material to a population, it is not the primary source of raw material for evolutionary forces.
In summary, while selection, genetic drift, and gene flow are important evolutionary forces, mutation is the fundamental process that generates new genetic variations, providing the raw material for these forces to act upon.
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