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olya-2409 [2.1K]
3 years ago
15

Which factor does not greatly influence the rate of

Biology
1 answer:
jonny [76]3 years ago
7 0

Answer:

a. transcription

Explanation:

<em>Sugar transport in phloem is referred to as pressure flow and it involves the movement of sugar through the phloem vascular tissue from the regions where sugar is synthesized (by photosynthesis) to other parts of the plant's body that require sugar.</em>

The parts of plants where sugar is synthesized (usually the leaf) is known as sugar source while the parts where they are transported is referred to as the source. Sources are usually areas of of high osmotic concentration and high water pressure while sinks are usually areas of low osmotic concentration and low water pressure.

<em>Hence, sugar transport in the phloem can be said to be influenced by the rate of sugar production at the source (rate of photosynthesis), turgor pressure as well as sugar concentration in sinks and sources.</em>

The only option that has no known effect on sugar transport in the phloem is transcription.

The correct option is a.

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Which of the following are true of epigenetic changes?
Iteru [2.4K]

Answer:

all of the above

Explanation:

Epigenetic alterations are modifications of the genome transmitted during cell division, which do not involve changes in the DNA sequence, are hereditary and are capable of modifying gene expression. In addition, they are temporary modifications that allow DNA to be transcribed and have the ability to move histones to open or close a chromosomal region. There are three main mechanisms of epigenetic alterations: DNA methylation, histone modifications and genomic imprinting.

6 0
3 years ago
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9) Genetic variation is the source for evolution. Without a variety of phenotypes, there would be no differential survival upon
Firlakuza [10]

The genetic variation occurs due to induced changes to the genome from environmental factors, fertilization of two haploid gametes during gamete fusion. The correct options are D and E.

<h3>What is genetic variation?</h3>

The presence of differences in gene sequences between individual organisms of a species is referred to as genetic variation. It allows for natural selection, which is one of the primary forces driving life's evolution.

The genetic variation occurs due to induced changes to the genome from environmental factors, fertilization of two haploid gametes during gamete fusion.

Thus, the correct options are D and E.

For more details regarding genetic variation, visit:

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3 0
2 years ago
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What would happen to the amount of
Sveta_85 [38]

Answer:

Gravity would also double

Explanation:

Newton's Law of Universal Gravitation says that the force of gravity is directly proportional to the mass.  So if the size of the moon did not change and you were standing at the exact same spot on the moon and the mass of the moon doubled, the force of gravity you would experience would also be doubled.

3 0
3 years ago
Pathogens are transmitted in only two ways: by direct contact and by vectors.
Marina86 [1]

Answer: False

Explanation:

Pathogens can be transmitted in many ways. It can spread by direct contact, indirect contact, or by vectors.

The mode of transmission can be skin contact, airborne particles, touching a surface, bodily fluids, touched by an infected person.

The mode of transmission can be vector that carries disease and helps in disease transmission.

So, the pathogens can be transmitted by direct contact, indirect contact or by vectors and by many more ways.

4 0
3 years ago
Do bacteria have internal membranes?
natita [175]

Answer: yes

Explanation: Prokaryotes are unicellular organisms that lack organelles or other internal membrane-bound structures. ... Some bacteria have a capsule outside the cell wall. Other structures are present in some prokaryotic species, but not in others.

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