Answers
Answer:
According to the image that represents a cell in the human body, the true statement is that structure 4 is the cell membrane that provides exchange of O₂ & CO₂.
Explanation:
In cells, the cell membrane acts as a semi-permeable barrier to the passage of substances, including nutrients and oxygen (O₂).
One of the functions of the cell membrane is to allow the exchange of O₂ —necessary for the cell— and carbon dioxide (CO₂), a product of cell metabolism that must be removed.
In the image, the structure identified with the number 4 corresponds to a cell membrane of human cells that provides this gas exchange.
The other options are not correct because:
Structure 1 is a ribosome, not a chloroplast. Structure 2 is the nucleus, not a vacuole containing DNA. Structure 3 is a mitochondria, but protein synthesis does not occur there.Related Questions
What is the process of breaking down lactic acid in the liver?
- Reduction
- Respiration
- Oxidation
- Ventilation
Answers
Answer:
Oxidation
Explanation:
it is Oxidation because oxygen combines with lactic acid to form carbon dioxide
—xoxo
The group of species to which an organism belongs is its:
Answers
Answer: The taxonomic classification system (also called the Linnaean system after its inventor, Carl Linnaeus, a Swedish botanist, zoologist, and physician) uses a hierarchical model. hope this helps. Can u give me brainliest
Explanation:
From the phylogenetic tree produced in response to your submission of the four amino acid sequences, what can you infer about the evolutionary relationship of the four organisms: cow, chicken, potato, and yeast?
Answers
From the phylogenetic tree produced in response to your submission of the four amino acid sequences, it can be inferred about the evolutionary relationship of the four organisms: cow, chicken, potato, and yeast that all four of them belong to different kingdoms.
Further, cow and chicken, which are both animals, are closer related to each other than they are to the plant kingdom which includes potato. Yeast, on the other hand, being a fungus, is distantly related to all the three kingdoms and hence appears to be a more primitive organism as compared to the rest of the three organisms or kingdoms.
In addition to the above information, students can also infer that the degree of differences between the amino acid sequences can be used to estimate the time since the organisms shared a common ancestor. This can also be used to determine how long it has been since the four organisms diverged from each other.
Learn more about Amino acid
https://brainly.com/question/31872499
#SPJ11
Study the illustration.
Which term best describes the circular, enclosing structure
formed by the cell membrane in squares 3 and 4?
O sac
O vesicle
O lysosome
O enzyme
Answers
The best term that describes the circular, enclosing structures formed by the cell membrane in squares 3 and 4 is vesicles; option B
What are vesicles in a cell?Vesicles are small membrane-bound sacs that are used by the cells to transport materials within or outside the cell.
These vesicles transport materials such as proteins and fluids surrounded by lipid bilayers to or out of the cell.
Within the cell, vesicles are produced by the Golgi apparatus to transport materials within or outside the cell.
The cell membrane also forms vesicles that enclose substances to be taken into the cell.
learn more about vesicles at: https://brainly.com/question/4413160
#SPJ1
A bug repellant is sprayed on one arm. The other arm is not sprayed. The number of bug bites is recorded after two hours.
Research question:
Hypothesis:
Answers
Answer:
Research question: Will the arm spayed with bug will the bug repellent have less bites than the arms not sprayed?
Hypothesis: There'll be less bites on the arm sprayed with bug repellent because the chemicals from the repellent should repel bugs
Hope this helps have a nice day :)
Will the arm with bug spray have less bug bites than the arm without?
Hypothesis:
If the arm without bug spray had more bite marks, then the bug spray repels bugs because if it’s chemical components.
the gives us the distinct qualitys that make us human and allows us to think about the future to be playful and creative
Answers
Answer:
Brains
Explanation:
the brain gives us the distinct quality that make us human and allows us to think about the future to be playful and creative
U1:45.59
Which describes the motion of the plates?
O The hanging wall and footwall both move vertically.
O Shearing is causing the plates to slide past each other.
O The hanging wall moves down in relation to the footwall.
O Compression is causing the plates to move toward each
other.
Answers
Answer:
D
Explanation:
Shearing is causing the plates to slide past each other describes the motion of the plates. Therefore, the correct statement is option B.
What is the cause of plate motion?Plate motion is caused due to movement of the underlying mantle creating convection currents to drive the plates. When two plates meet, the type of motion depends on the type of boundary.
The plates move past each other in a shearing motion at a transform boundary that is the cause of earthquakes. In this type of boundary, no destruction of the lithosphere was observed. The two plates move away from each other to create new lithosphere as magma rises from the mantle at a divergent boundary.
The two plates move towards each other which can result in volcanic activity at a convergent boundary.
Therefore, shearing causing the plates to slide past each other best describes the motion of the plates.
Learn more about the motion of plates here:
https://brainly.com/question/30344940
#SPJ7
Do all genes have a simple dominant/recessive relationship between two alleles? What is an example of a human trait that does have
this relationship between its alleles?
Answers
Answer:
Genes come in different versions, otherwise known as alleles, with dominant alleles being expressed over recessive alleles (one stronger than the other in terms of traits and etc). Recessive alleles are only expressed when no dominant allele is present. Color of the eyes, for example is allele A is brown color eyes and B is blue color eyes, and assume that A is the dominant then that relationship will prove A to be the simple dominant and B the recessive.
question mode multiple choice question hypovolemia and dehydration are both examples of fluid deficiency. how do they differ? multiple choice question. in hypovolemia only water is lost, and in dehydration both water and electrolytes are lost. in dehydration water is lost, and in hypovolemia both water and electrolytes are lost. they differ only in the amount of fluid lost. in dehydration only water is lost, and in hypovolemia only electrolytes are lost.
Answers
In dehydration, water is lost, and in hypovolemia both water and electrolytes are lost.
What is fluid deficiency?
Dehydration occurs when you use or lose more fluid than you take in, and your body doesn't have enough water and other fluids to carry out its normal functions.
Which are types of fluid deficiency?
Deficient fluid volume (also referred to as hypovolemia or dehydration) occurs when the loss of fluid is greater than the fluid input. Common causes of deficient fluid volume are diarrhea, vomiting, excessive sweating, fever, and poor oral fluid intake.
What happens during hypovolemia?
Hypovolemic shock is an emergency condition in which severe blood or other fluid loss makes the heart unable to pump enough blood to the body. This type of shock can cause many organs to stop working.
Thus, water is lost in dehydration, and water and electrolytes are lost in hypovolemia.
To know more about dehydration and hypovolemia:
https://brainly.com/question/10666002
#SPJ4
Plants absorb the greenhouse gas carbon dioxide during the process of _____.
Answers
Answer:
Photosynthesis
Explanation:
Plants convert carbon dioxide and water into sugar and oxygen through the process of photosynthesis. Plants absorb carbon dioxide from the atmosphere during photosynthesis.
What type of transport is being shown in the image below?
Glucose molecules
O Osmosis
O Facilitated diffusion
O Diffusion
O Active transport
Answers
What is root tip structure and what are the roles of the root tip structures? Please describe.
Answers
Roots only develop in length from their tips. The growing tip of the root is protected by a thimble-shaped root cap as it travels through the earth.
The apical meristem, a tissue of rapidly dividing cells, is located just behind the root cap. The root tip has three major zones: a zone of cell division (active cell division), a zone of elongation (cell lengthening), and a zone of development (cells differentiate to form different kinds of cells). Water, nutrients, and sugars are carried by the root vascular tissue. The root cap, which is a small tissue at the root's tip, shields the root from environmental stress and aids in gravity sensing.
Learn more about vascular tissue.
https://brainly.com/question/28964193
#SPJ4
A field measures 10 m by 30 m. In ten 1 m2 quadrats thrown randomly onto the field, an average of 5 flowers is counted. What is the estimated number of flowers on the whole field?
Answers
Answer:
Total area of field = 10 m × 30 m = 300 m2
Number of quadrats = 300
Average number of flowers per quadrat = 5
Total number of flowers = 300 × 5 = 1500
what would the outcome be if an antibiotic-sensitive homogeneous (no variation) strain of s. aureus was grown in the presence of antibiotics? a. cell growth that begins slowly but proceeds rapidly b. rapid mutation and growth c. no cell growth d. eventual rise of antibiotic-resistant cells e. rapid growth, and then sudden death
Answers
If an antibiotic-sensitive homogeneous strain of S. aureus is grown in the presence of antibiotics, the most likely outcome would be the eventual rise of antibiotic-resistant cells (option d).
Here's a step-by-step explanation:
1. Antibiotic-sensitive strain: This means that the S. aureus strain is susceptible to the effects of antibiotics. In other words, the antibiotics can effectively kill or inhibit the growth of this strain.
2. Homogeneous (no variation) strain: This means that all the individual bacteria within the strain are genetically identical. There is no genetic variation or diversity among them.
3. Growing in the presence of antibiotics: When the homogeneous antibiotic-sensitive strain is exposed to antibiotics, the antibiotics will initially work to kill or inhibit the growth of the bacteria. However, since there is no genetic variation in the strain, all the bacteria will respond to the antibiotics in the same way.
4. Selective pressure: The presence of antibiotics acts as a selective pressure. Some bacteria within the strain may have random mutations or genetic changes that provide them with resistance to the antibiotics.
5. Survival of resistant cells: As the antibiotics continue to exert their effects, the antibiotic-resistant cells within the homogeneous strain will have a survival advantage over the antibiotic-sensitive cells. These resistant cells can continue to grow and divide while the sensitive cells are killed or inhibited.
6. Increase in antibiotic-resistant cells: Over time, the resistant cells will multiply and dominate the population, leading to the eventual rise of antibiotic-resistant cells within the strain.
It's important to note that this process may not occur immediately but can happen over multiple generations of bacterial growth and exposure to antibiotics.
In summary, when an antibiotic-sensitive homogeneous strain of S. aureus is grown in the presence of antibiotics, the most likely outcome is the eventual rise of antibiotic-resistant cells (option D). This is due to the selective pressure imposed by the antibiotics, which favors the survival and growth of bacteria with resistance to the antibiotics.
Learn more about S. aureus at https://brainly.com/question/31880701
#SPJ11
Pond silk or water silk is the common name of......
a. Nostac b. spirogyra
c. chalamydomonas d. peziza
Answers
Answer:
B
Explanation:
Spirogyra is free-floating green algae present in freshwater habitats such as ponds, lakes, etc. Spirogyra is commonly known as water silk or pond silk. They have a filamentous and unbranched vegetative structure.
or
Spirogyra forms a silk like layer on the water. It is present in abundant amount on the fresh water bodies or slow running water. They are slippery in nature, so are commonly known as pond silk or water silk.
why did mendal use peas in his experiment
Answers
Answer:
He chose peas because they had been used for similar studies, are easy to grow and can be sown each year. Pea flowers contain both male and female parts, called stamen and stigma, and usually self-pollinate.
Explanation:
Hope this helps!
What is the definition of autotroph definition biology?
Answers
Autotrophs are organisms that produce their own food using inorganic substances as their energy source.
They are also known as producers as they form the basis of the food chain in an ecosystem. Autotrophs use energy from sunlight or chemical reactions to synthesize organic molecules like carbohydrates, proteins, and fats.
These organic molecules provide the necessary energy for the organisms to carry out their life processes.
The ability to produce their own food distinguishes autotrophs from heterotrophs, which must consume organic matter to obtain their energy.
Autotrophs play a crucial role in sustaining life on earth by converting energy from the sun or inorganic compounds into a form that can be used by other organisms. Examples of autotrophs include plants, algae, and some bacteria.
To know more about Autotrophs click on below link:
https://brainly.com/question/11209881#
#SPJ11
“Some viruses are programmed to reproduce by identifying bacteria, killing them, and assembling new viruses.viruses do not eat the bacteria and do not grow after they are made. Viruses are not alive. Explain two reasons why.”
Answers
1. Viruses cannot reproduce on their own: Unlike living organisms, viruses cannot reproduce on their own. They need to infect a host cell and hijack the host cell's machinery in order to replicate themselves. Once they have infected a host cell, they use the cell's energy and resources to create new copies of themselves. However, they do not have the ability to reproduce outside of a host cell.
2. Viruses do not have the ability to carry out metabolic processes: Living organisms carry out metabolic processes, such as respiration and digestion, in order to obtain energy and nutrients. Viruses do not have the ability to carry out these processes on their own. They rely entirely on the host cell to provide them with energy and nutrients. In fact, viruses do not even have the necessary machinery to carry out these processes. They lack the organelles, such as mitochondria, that are responsible for energy production in living cells.
HELP PLEASE ANSWER WITH A 10 SENTENCE PARAGRAPH!
How do scientists use the electromagnetic spectrum to view our universe? Would we be able to see some objects in the universe if we only used the visible spectrum? Explain.
Answers
Answer:
Explanation:
Astronomers use the entire electromagnetic spectrum to observe a variety of things. Radio waves and microwaves – the longest wavelengths and lowest energies of light – are used to peer inside dense interstellar clouds and track the motion of cold, dark gas.
Scientists are concerned that this technology may backfire. Explain what they mean.
Answers
Answer: scientist think that if warnings are given earlier people might choose to flee the area rather than seek shelter as a result roadways are blocked and more people will be exposed
Explanation: this is exact answer please rewrite this in your own words
would the following compound be oxidized by hypochlorous acid (hocl) and, if oxidation occurs, what would the products be? assume that conditions are chosen such that no carboxylic acid is formed.
Answers
Your question is not complete, the reaction of this problem is Benzene with h and methyl OH resulting in the product benzene methyl alkene.
Hypochlorous acid is a weak acid that is formed when chlorine dissolves in water, and it partially dissociates, forming hypochlorite, ClO⁻. HClO and ClO⁻ are oxidizing agents and are the main chlorine solution disinfection agents.
Although HOCl is a very weak acid, the hypochlorite ion is a strong oxidizing agent and easily liberates oxygen atoms leaving the simple chloride ion Cl-. One of the chemical groups it attacks is the –SH side group on the amino acid cysteine.
Learn more about hypochlorous acid at https://brainly.com/question/28384520
#SPJ4
which statement best describes a pattern of reproduction exhibited by most aquatic vertebrates
Answers
Aquatic organisms have external fertilization and reproduction is done through mating of male and female.
How do aquatic vertebrates reproduce?All vertebrates reproduce through mating of male and female. Aquatic species generally have external fertilization, whereas terrestrial species usually have internal fertilization.
In conclusion, aquatic organisms have external fertilization and reproduce through mating of male and female.
Learn more about vertebrates here: https://brainly.com/question/10714806
How are simple carbohydrates able to form larger macromolecules?
A. Organic compounds chemically combine using carbon, hydrogen, and oxygen atoms.
B. Organic compounds chemically combine with inorganic compounds to form large macromolecules.
C. Larger macromolecules first break down into smaller macromolecules and combine during the reaction.
D. The hydrogen in the smaller macromolecules combine to form larger macromolecules.
Answers
A) organic compounds chemically combine using carbon, hydrogen, and oxygen atoms
Answer:
Organic compounds chemically combine using carbon, hydrogen, and oxygen atoms.
Individuals with one form of lactose intolerance do not produce the
enzyme lactase because the gen coding for the production of lactase is
turned off in their cells. As a result, which of the following processes
does not occur for the gene?
Select one:
a. Transcription
b. Hydrogenation
c. Replication
d. Hydrolysis
Answers
Answer: Transcription - A
Explanation:
This problem is talking about the lac operon and the gene expression of lac operon. If the gene is turned off, then transcription, the generation of mRNA won't occur.
What were the phenotype and genotype ratios of mendel’s F1 crosses? What do these numbers represent?
Answers
The phenotype and genotype ratio of Mendel's F1 crosses where 1:1:1:1 for both. These numbers represent that all the offspring are alike in the F1 generation.
Mendel's cross was performed between a homozygous dominant (AA) and a homozygous recessive (aa) parents. The result that was obtained from this cross was that all the offspring had the dominant trait phenotypically. When the offspring were observed genotypically they all had the genotype Aa in F1 generation.
Phenotype of an individual depicts its morphology or the outer appearance. The phenotype is the result of the genotype of the organism. For example, an individual having the genotype TT for height will appear tall due to homozygous dominant alleles.
To know more about Mendel's cross, here
brainly.com/question/10713984
#SPJ1
As food enters the stomach, ____________ hormone stimulates secretion of gastric juices by cells in the stomach.
Answers
The lining of the stomach and upper small intestine contains "G" cells, which create the hormone gastrin, which is then released into the bloodstream.
What activates the stomach's gastric phase of digestion?
Acetylcholine (ACh), histamine, and gastrin are the three substances that primarily trigger gastric output. This negative feedback loop slows down the gastric phase by decreasing the demand for pepsin and HCl below a pH of 2, which inhibits the parietal cells and G cells.
The sight, taste, and smell of food stimulate which stage of stomach secretion?
The sight, smell, idea, or taste of food starts the cephalic phase of gastric secretion. The cerebral cortex and the appetite both produce neurological signals centers of the hypothalamus and amygdala. A conditioned reflex, this increased secretory activity.
To know more about gastric juices visit:
https://brainly.com/question/1383408
#SPJ4
ssume there is no interference between regions (a-b and b-c). when an f1 individual produces gametes, what proportion of its gametes would have abc genotype?
Answers
The proportion of f1 individual gametes would have abc genotype is 0.04
In the first cross one of the parent has only dominant allele and one has only recessive allele that means the offspring in F1 will be 100% heterozygous
Xx Yy Zz
the gametes resulted from this individual are
XYZ XYz XyZ Xyz xYZ xYz xyZ xyz
it produces 8 types of gametes one of which is xyz.
Choosing three from 8 gametes ,the proportion will be 3/8
In decimal terms 3/8=0.0375=0.04(approx)
Gametes are organism's reproductive cells. They are also called as sex cells. Female gametes are called the ova or egg cells, and male gametes are called the sperm. Gametes are haploid cells, and each cell carries only the one copy of each chromosome.
Gametogenesis is the process in which a haploid cell (n) is formed from a diploid cell (2n) via meiosis and cell differentiation. Gametogenesis in the male is called as spermatogenesis and produces spermatozoa.
Hence, the proportion is 0.04.
To know more about gametes, visit here:
https://brainly.com/question/2569962
#SPJ4
Cell Type
Root hair cell from a plant
Water
25. Complete the chart by describing the function and structure in each cell.
Function
Structural adaptation(s) that enable
the cell to carry out its function.
Un
Soil particles
Answers
Answer:
\(\(\purple{\rule{45pt}{7pt}}\purple{\rule{45pt}{999999pt}}\(\)
Because they have a wide surface area to speed up absorption, root hair cells are designed to absorb water and mineral ions.
What is the role of root hair cells in plants?Plants are anchored by root hairs that emerge from the surface of the soil and take up water and minerals.
Vascular tissue in the heart of the root transports food produced in the leaves to the root, while transporting water and minerals away from it.
Its main purposes include anchoring the plant, absorbing water and dissolved minerals and transferring them to the stem, as well as storing reserve food.
Water and nutrients are mostly taken up by root hairs from the rhizosphere.
Therefore, root hair cell have large surface area that enable the cell to carry out its function.
Learn more about root hair cells here:
https://brainly.com/question/27993113
#SPJ5
What is the advantage of the branching design of the bronchioles on our lungs into 700 million alveoli?
Answers
Answer:
More surface area for oxygen to be absorbed into the blood
Explanation:
what are the three characteristics that all organizations share?
Answers
An organization refers to a formal structure of people who are typically arranged and managed to accomplish a specific purpose. Although organizations come in many forms and sizes, some characteristics are shared by all organizations. These characteristics include a defined purpose, distinct boundaries, and a formal structure.
Defining a purpose - The most fundamental feature of an organization is its purpose. It should have a distinct purpose, and the organization's entire activities should be geared towards achieving that objective. If an organization's goal is not clearly defined, its workers will lack a sense of direction. Distinct Boundaries - Organizations should have clear boundaries that distinguish them from others. Organizational boundaries identify who is a member of the organization and who is not. Boundaries also assist in establishing an organization's identity, separating it from other organizations, and allowing for the allocation of resources more efficiently.
Formal structure - Formal structure is the third characteristic that all organizations share. The formal structure outlines the chain of command and reporting channels. It determines how the organization is structured and how it operates. This structure may consist of departments, teams, or individuals who work together to attain the organization's goals.
To know more about formal structure visit:-
https://brainly.com/question/29362180
#SPJ11