this still shot of leaf development illustrates different genetic states of the blue, black, and green cells. which cells are the stem cells?
Answers
The blue cells are the stem cells in this still shot of leaf development. Stem cells are undifferentiated cells that can develop into any type of cell in the body, or in this case, leaf.
About Stem cellsThe stem cells in this still shot of leaf development are the blue cells. Stem cells are a type of undifferentiated cell that can divide and differentiate into different cell types.
In this image, the blue cells are in the undifferentiated state and have the potential to become either black or green cells. The black and green cells, on the other hand, have already differentiated into their respective cell types and can no longer become other cell types.
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Related Questions
let's say that two people (both heterozygotes) can taste a chemical substance called ptc. the ability to taste ptc is caused by a dominant allele (a). the inability to taste ptc is caused by a recessive allele (a). what proportion of the children of a cross between aa x aa would be expected not to taste ptc?
Answers
0% of their descendants proportion of the children of a cross between aa x aa would be expected not to taste ptc
A single gene with two alleles—the dominant allele "A" and the recessive allele "a"—determines the capacity to taste PTC. A person can taste PTC if they have two copies of the dominant allele "AA." A person cannot taste PTC if they carry two copies of the recessive gene "aa." A person may taste PTC if they possess one copy of each "Aa" allele.
When two heterozygotes "Aa" are bred, half of the progeny will have the dominant gene "A" and the other half will carry the recessive allele "a". Therefore, it is projected that 0% of their descendants would not taste PTC.
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Three uses for cultivators
Answers
Answer:
To prepare a proper seed bed.
Hope this helps!
Answer: to mix and aerate soil, remove weeds, and in general create the perfect seedbed for many plants with less physical labor than using a manual tool like a spade.
meaning: aerate
introduce air into (a material)
when the semilunar valves open it signals the onset of the ejection period. the aortic pressure reflects changes in the ejection of blood from which part of the heart?
Answers
The aortic pressure reflects changes in the ejection of blood from left ventricle of the heart.
Heat is four chambered muscular organ in humans. The upper two chambers are atrium and lower two chambers are ventricles. Ventricles dispose the blood received from auricles into different parts based on the oxygen level. The semilunar valves are cusps or pocket like structures present to prevent blood backflow.
There are two such valves namely aortic and pulmonary valves. Aortic valve connects left ventricle with different parts of body while pulmonary valve connects right ventricle and pulmonary artery. Since aorta is directly connected to left ventricle, thus aortic pressure reflects changes from it.
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During pyruvate oxidation, which of the following also occur(s)?
-the formation of NADH
-the oxidation of pyruvate
-the formation of acetyl-CoA
-the formation of CO2
Answers
During pyruvate oxidation, the oxidation of pyruvate, the formation of acetyl-CoA, and the formation of CO2 also occur along with the formation of NADH.
Pyruvate oxidation is a metabolic pathway that occurs in the mitochondria of eukaryotic cells and the cytosol of prokaryotic cells. The pyruvate molecule that is produced in glycolysis enters the mitochondria from the cytosol to undergo oxidative decarboxylation. Pyruvate oxidation is the link between glycolysis and the citric acid cycle (also known as the Krebs cycle or the TCA cycle).Pyruvate oxidation involves the conversion of pyruvate into acetyl-CoA, a process that includes the removal of one carbon atom from pyruvate and the formation of CO2. During this reaction, one NAD+ molecule gets reduced to NADH, which can then be utilized by the electron transport chain to generate ATP. The overall reaction for pyruvate oxidation is: Pyruvate + CoA + NAD+ → Acetyl-CoA + CO2 + NADH. In conclusion, during pyruvate oxidation, the formation of NADH occurs as well as the oxidation of pyruvate, the formation of acetyl-CoA, and the formation of CO2.
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does the cell divide during the interphase
Answers
Answer:
Yes
Explanation:
During interphase, the cell grows and makes a copy of its DNA. During the mitotic (M) phase, the cell separates its DNA into two sets and divides its cytoplasm, forming two new cells.
suppose you were working with two pathogenic cocci, neisseria gonorrhoeae and streptococcus pyogenes, predict for each bacteria if it would grow or not grow on pea (phenyl ethyl alcohol agar). explain why you made your prediction.
Answers
Based on the provided information, I can make predictions about the growth of Neisseria gonorrhoeae and Streptococcus pyogenes on phenyl ethyl alcohol (PEA) agar.
Neisseria gonorrhoeae: It is unlikely that Neisseria gonorrhoeae would grow on PEA agar. PEA agar is selective for Gram-positive bacteria, inhibiting the growth of Gram-negative bacteria. Neisseria gonorrhoeae is a Gram-negative bacterium, and its growth is not expected on PEA agar.
Streptococcus pyogenes: Streptococcus pyogenes is a Gram-positive bacterium, and it has the potential to grow on PEA agar. PEA agar is selective for Gram-positive bacteria, allowing their growth while inhibiting Gram-negative bacteria. Streptococcus pyogenes falls into the category of Gram-positive bacteria and can be expected to grow on PEA agar.
The predictions are based on the selective properties of PEA agar, which selectively promotes the growth of Gram-positive bacteria and inhibits the growth of Gram-negative bacteria. Neisseria gonorrhoeae being a Gram-negative bacterium is unlikely to grow on PEA agar, while Streptococcus pyogenes being a Gram-positive bacterium has the potential to grow on this selective medium.
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Which environmental agency found itself under investigation after it
was discovered that it was making mutually beneficial agreements
with environmental polluters?
A-Environmental Protection Agency
B-U.S. Department of Agriculture
C-World Wildlife Fund
Answers
Environmental Protection Agency- found itself under investigation after it was discovered that it was making mutually beneficial agreements with environmental polluters.
What is Environmental Protection Agency?
President Richard Nixon issued an executive order in December 1970 creating the Environmental Protection Agency (EPA). The goal of this federal government organisation is to safeguard both human and environmental health. The EPA, which has its main office in Washington, D.C., is in charge of developing laws and standards that advance both public and environmental health.
Cosian bargaining theorem applies to EPA. The theorem states that polluter and victim can reach a mutually beneficial bargain if the damage from pollution is higher than the polluter’s net return from the sale of the good generating the pollutants.
Hence the correct option is A; Environmental Protection Agency
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Which is a physiologic change of the cardiovascular system associated with aging?
1 Reduction in size and efficacy of the left ventricle
2 Increase in the sensitivity of baroreceptors
3 Decrease in the number of pacemaker cells
4 Thinning of the aorta and other larger arteries
Answers
Option 1 A reduction in size and efficacy of the left ventricle is a physiological change of the cardiovascular system associated with aging.
As people age, the heart undergoes a number of changes that can lead to a reduction in the overall function of the cardiovascular system.
The left ventricle is responsible for pumping blood out of the heart and into the rest of the body, and it can become less efficient with age due to a number of factors, including changes in the structure and function of the heart muscle, decreased flexibility of the heart valves, and a decrease in the number of pacemaker cells in the heart.
These changes can lead to a decrease in the cardiac output, which is the amount of blood that is pumped out of the heart per minute, and an increase in the risk of cardiovascular disease.
As people age, the heart undergoes several structural and functional changes, such as a decline in the elasticity of the heart chambers, thickening of the heart walls, and a reduction in the maximum heart rate.
These changes can lead to a decreased ability of the heart to pump blood efficiently, which may result in various cardiovascular diseases.
The reduction in size and efficacy of the left ventricle is one of the most common age-related changes in the cardiovascular system, and it can contribute to the development of heart failure, a condition in which the heart is unable to pump enough blood to meet the body's needs.
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please please help me for biology
Answers
Answer:
earthquakes and flooding
Explanation:
Answer:
Competition
Explanation:
Density-dependent limiting factors are factors that are dependent on the density of the species; for example, if the density is low, there is not much competition, so it won't be a limiting factor, but this isn't the case when density is high.
Who is Ross Carr? Who is Ross Carr?
Answers
If parent one has Gg for the genotype and parent two has gg, What are the possible genotypes for their offspring?
Answers
Answer:
Here you go. I did a punette square for you, so you can have a visual. (PS. Not sure if I'm spelling "punette" right lol, but you get the gist.)
Explanation:
Basically 50% of their offspring are going to have Gg, while the other 50% is going to have gg.
Hope this helps you :)
Which is most likely the reason zebras and horses are considered separate species?
They cannot breed.
Their offspring cannot breed.
They look different from each other.
They are found in different habitats.
Answers
Species are the level of taxonomical classification. Zebras and horses are closely related species. They are considered as separate species because they cannot breed.
Thus, the correct option is A.
What is Species?Species is a group of organisms that can interbreed to produce fertile off-springs. They cannot breed under natural conditions.
Zebras and horses are the two different species which belong to the same horse family Equidae. Zebras are considered as wild horse as they belong to same family.
Under natural conditions these two species cannot breed. If Zebras and horses interbreed, the offspring produced from this will be sterile. The offspring cannot breed.
Therefore, Zebras and horses cannot breed under natural conditions. Hence, option A is correct.
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Which of the following describes an effect of particulate matter on health?
Coarse particles are more dangerous, as they infiltrate deep into the lungs.
Fine particles are less dangerous, as they mainly affect nasal passages.
Coarse particles are associated with aggravated asthma.
Fine particles are associated with decreased lung function.
Answers
Answer:
Exposure to such particles can affect both your lungs and your heart. Numerous scientific studies have linked particle pollution exposure to a variety of problems, including: ... decreased lung function. increased respiratory symptoms, such as irritation of the airways, coughing or difficulty breathing.
Cigarette smoke contains a chemical that specifically mutates p53 and inactivates it. As a result of this mutation, what would happen in the affected cells? A.DNA damage would accumulate B. Cell death would not be activated C.The cell cycle would continue in spite of DNA damage D.All of the above
Answers
Answer:
The correct answer is - option D. all of the above.
Explanation:
Smoking cigarettes or consumption of tobacco contains chemical that is responsible for the mutating p53 gene specifically which inactivates the action of p53.
TP53 mutation changes the amino acid in the p53 protein which produces the altered or modified version of protein that is incapable of performing its action of repairing damaged DNA during cell cycle for genome stability. DNA damage would be accumulate as it is not able to control the cell division by apoptosis and cell death would not be activated.
Thus, the correct answer is - option D.
which statement describes the role of specialized cells in an organism?
A. Specialized cells are short lived and used for initial growth
B. Specialized cells perform specific functions in tissues
C. Specialized cells active during periods of extreme stress
D. Specialized cells divide to form unspecialized cells
Answers
How does a small population
cause evolution to occur more
quickly than in a large
population?
A. A small population is more likely to have
mutations.
B. A small population is affected more by a
change in allele frequency than a large
population.
C. The small populations have more variations
than large populations.
D. Small populations tend to have a higher
young population than large populations.
Answers
Answer:
Explanation:
B is the answer it Allele means DNA or genes .
Some events that take place during protein synthesis are listed.
1. DNA serves as a template for RNA production
2.Transfer RNA binds to specific amino acids and carries them to the ribosomes
3. Amino acids are bonded together to make proteins
4. Messenger RNA moves from the nucleus to the ribosomes
What is the correct order of protein synthesis?
3-2-4-1
1-4-2-3
1-2-4-3
Answers
Complete the following sentence.
Sod is harvested and then shipped in the form of
often to local customers.
Answers
Answer:
Rolls
Explanation:
I took the test.
in meiosis i, determines the number of chromosomes in the gametes. this is an essential process that serves to keep the same number of chromosomes in the embryo that will be formed when the gametes get together.
Answers
Reductional Division
Meiosis, the process by which germ cells are created, involves the initial cell division. Chromosome number is decreased from diploid (46 chromosomes) to haploid during reduction division (23 chromosomes). sometimes referred to as the initial meiotic division and meiosis. Before meiosis starts, the cell's chromosomes are reproduced. During meiosis, there are two divisions that take place.
Due to the genetic material's reduction from diploid to haploid during the first division, known as meiosis I, it is frequently referred to as a reductional division. The term "ploidy" describes how many chromosomal sets are present in a species' genome. Haploid denotes the presence of one pair of chromosomes, whereas diploid denotes the presence of two sets.
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Why is nitrogen important to all living things?
A. It is found in nucleic acids.
B. It is found in lipids.
C. It is found in all organic compounds.
D. It is found in carbohydrates.
Answers
Answer:
Because , it is found in nucleic acids.
In a longitudinal wave, wavelength can be measured as the distance between
A. two adjacent compressions
B. a compression and the next resting place
C. both.
D. none of the above
Answers
Answer:
A. two adjacent compressions
Explanation:
A wave is transverse if the oscillations occur at a right angle (transverse) to the direction of wave propagation. This kind of wave creates characteristic hills and down. Transverse waves include all-natural electromagnetic waves, rope waves, water waves, waves generated by the marketing of taut wire.
A wave is longitudinal if the oscillations occur along (along) the direction of wave propagation. The longitudinal wave creates characteristic places of thickening and thinning of the environment. Longitudinal waves include:
sound wave, elastic wave, laser beam
80 POINTS
Which kingdom is represtented by this organism answer quick please
Answers
Answer:
Bacterian
Explanation:
Trust me, I had this question on my exam as well!
The Kingdom represented by this organism is : Bacteria
The diagram attached below represents the kingdom bacteria and this is due to :
The presence of Flagellum (tail) which helps in the propelling of the organism. and Other body parts like Gelatinlike capsule. Kingdom of the organismThe organism is also a single celled prokaryotic organism which categorically defines the kingdom Bacteria.
Hence we can conclude that the kingdom represented by this organism is Bacteria
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I don’t know how to finish these sentences i need help
Answers
Why does physarum polycephalum branch out like a plant or fungus?
Answers
Answer:
Physarum first grows as single-celled amoebae, but the amoebae fuse, and the organism loses its 'cellular' makeup. As the organism continues to grow, nuclei divide without cell division. The resulting bag of nuclei is called a 'coenocyte' or 'plasmodium'.
Explanation:
The fluidity of the plasma membrane is primarily provided by the ______.
Answers
Answer:
The fluidity of the plasma membrane is primarily provided by the Phospholipids
Stimulus: You go to a sauna to relax. In the sauna, your body temperature increases, what is your body's response? *
A. You begin to shiver
B. You begin to sleep
C. You begin to sweat
D. You begin to exercise
which one ^
Answers
A high pitch sound will maximally vibrate the _______ side of the basilar membrane.
Answers
A high pitch sound will maximally vibrate the base of the basilar membrane side of the basilar membrane.
The location concept of pitch perception indicates that unique sound of the basilar membrane are sensitive to sounds of various frequencies. extra specifically, the base of the basilar membrane responds high-quality to excessive frequencies and the end of the basilar membrane responds high-quality to low frequencies.
Basilar membrane vibrations arise from alternating pressure will increase and reduces in Scala vestibuli and Scala media that in turn are because of the piston-like, inward-and-outward motion of the stapes. The basilar membrane helps the spiral organ, and vibrations are transmitted via the basilar membrane to the hair cells of the spiral organ.
Due to systematic sound in basilar membrane houses, excessive frequency sound stimulates sensory cells near the base of the cochlear spiral, whereas the low sound frequencies that are maximum critical for speech and music maximal stimulation of hair cells near the spiral.
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Which instrument would be best for measuring mass? *
O Scale that measures grams
O A Flask
O Scale that measures pounds
O A graduated Cylinder
O Measuring tape
Answers
Answer:
Scale that measure pounds
Answer:
Scale that measures grams.
Explanation:
Is a coconut a vegetable or fruit?
Answers
Answer: Answer. Botanically speaking, a coconut is a fibrous one-seeded drupe, also known as a dry drupe. However, when using loose definitions, the coconut can be all three: a fruit, a nut, and a seed. Botanists love classification.
Explanation:
When extra nutrients added to crops wash into
waterways and oceans, this is called:
-agricultural runoff
-dead zoning
-deforestation
-erosion
Answers
Answer:
I think, dead zoning is answer.Explanation:
Hope it helps you.Answer:
dead zoning
Explanation:
dead zones are formed when excess nutrients wash into bodies of water (this is known as eutrophication.)
because of excess nutrients organisms can't survive, that's why those areas are regarded as dead zones.