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ch4aika [34]
3 years ago
7

: new research is revealing that many cancers involve epigenetic alterations of: the bases a and t coding sequences in the dna o

ncogenes histones, the proteins around which dna is wrapped
Biology
1 answer:
galben [10]3 years ago
8 0

While genetics corresponds to the study of genes, epigenetics is interested in a "layer" of complementary information that defines how these genes will be used by a cell ... or not.

In other words, epigenetics is the study of changes in gene activity, does not involve modification of the DNA sequence and can be transmitted during cell divisions. Unlike mutations that affect the DNA sequence, epigenetic changes are made on the proteins surrounding the DNA and are reversible.


So the right answer is the proteins around which dna is wrapped

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oksano4ka [1.4K]

<u>Answer</u>: As the growth rate increases, the population size increases more rapidly. The slope becomes steeper.

An increasing growth rate means that more and more of the offspring will survive. Thus, this leads to a cumulative effect in which with an increasing growth rate, the slope becomes steeper.

If in the beginning only 1 out of 10 offspring will survive (r=0.1), then the population will increase with only one individual. However, if r=0.5 then 5 new individuals will be added. These in turn will be able to reproduce themselves with even higher r, which results in the cumulative effect mentioned above. The more individuals survive and the higher r, the faster the population size will increase.

No ecosystem is capable of sustaining such a growth for long periods of time. The population will reach and exceed a level called carrying capacity, which is the maximum number of individuals the ecosystem can sustain. Once this happens, the growth rate will be negative until the population size is once more under this level.

From now on, the population will vary around the carrying capacity with r switching from positive to negative in a continuous cycle. Furthermore, if this level is exceeded very much, then currently available resources will be consumed and thus the population size will plummet back to extremely low levels.

Locust swarms are a good example. The population size increases rapidly and devours all available food. If no more food can be found, then the majority of the individuals will die of starvation.

5 0
4 years ago
The 3D shape of a _____ molecule determines its function. Change the shape, and you change the function.
loris [4]

Answer:

B. Protein

Explanation:

3D structure of protein

Hope that helps

8 0
3 years ago
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Fofino [41]
The rectus abdominis is not classified as a convergent muscle


7 0
3 years ago
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kow [346]
The body segment of an insect that supports the legs and wings is the thorax. 
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3 years ago
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Well, they feel the womb and hear the outside. that's about it other than making the baby.
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4 years ago
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