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Marina CMI [18]
4 years ago
15

For sexually reproducing multicellular organisms, when does mitosis begin?

Biology
2 answers:
ella [17]4 years ago
8 0
"The evolution of sexual reproduction is a major puzzle because asexual reproduction should be able to outcompete it as every young organism created can bear its own young. This implies that an asexual population has an intrinsic capacity to grow more rapidly with each generation. This 50% cost is a fitness disadvantage of sexual reproduction. The two-fold cost of sex includes this cost and the fact that any organism can only pass on 50% of its own genes to its offspring. One definite advantage of sexual reproduction is that it prevents the accumulation of genetic mutations. Sexual selection is a mode of natural selection in which some individuals out-reproduce others of a population because they are better at securing mates for sexual reproduction. It has been described as a powerful evolutionary force that does not exist in asexual populations."
olganol [36]4 years ago
6 0
The answer is C. its easy just study Don't Look for answers
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Other than size, what are the two biggest differences between the megalodon shark and modern sharks?
nexus9112 [7]

Answer:

they are stronger and faster.

Explanation:

7 0
4 years ago
Which of the following is an example of secondary succession? A. breaking down of bare rock by fungi and mosses B. pioneer plant
Tom [10]

Answer:

C. growth of plants after a forest is destroyed by fire

Explanation:

When the ecological succession occurs on the land or region which was never inhabited by plants previously, the process is called primary succession. On the other hand, secondary succession occurs on land where the existing vegetation was destroyed by some disturbances. Secondary succession is a fast process compared to the primary succession as the soil is already present to support the growth of plants.

Among the given examples, the growth of plants after the vegetation of forest was destroyed by fire represents the process of secondary succession. Growth of vegetation on bare rocks, in the cracks in the concrete surface, or after the melting of glaciers represents the process of primary succession.

4 0
3 years ago
Explain what the greenhouse effect is, use diagrams if you wish.
Alecsey [184]

Answer:

See the answer below

Explanation:

<em>The greenhouse effect refers to the heating effects produced by the earth's atmosphere on the planet as a result of the atmosphere absorbing reflected radiation from the sun by the earth. </em>

The earth's atmosphere is a blanket of gases, some of which are referred to as greenhouse gases. These gases have the capacity to trap radiations coming from the sun that is reflected by the ground layer of the earth. Thus, they produce a warming effect on the earth.

A bulk of the <u>radiation coming from the sun </u>is reflected back into space by the earth's stratosphere. The small percentage that passes through are dispersed in different directions and some of them pass through the atmospheric blanket to reach the ground layer of the earth. While some are absorbed by the ground itself, <u>some are emitted back</u> into the atmosphere where the <u>greenhouse gases trap a large portion</u> and prevent them from escaping back into space.

This leads to the warming of the earth and the entire phenomenon is referred to as the greenhouse effect.

7 0
3 years ago
What are some similarities between the structure of DNA and a ladder?
Sidana [21]
The similarity just lies in the structure. DNA is double-stranded, however it is twisted/helical, while the ladder does not twist. However, other than that, they are quite similar. The 2 strands (5' -> 3' and 3' -> 5') of DNA serve as the 2 vertical sides of the ladder. The base pairs of DNA are what connect the two strands together. So, in terms of the ladder, think of the steps of the ladder as the base pairs. Think each step as consisting of 2 entities joining together to make 1 big step. For example, think of a step having 2 halves down the middle. 1 half would be a guanine (base) and the other half would be a cytosine (base). Guanine is connected to the 5' --> 3' strand (Left vertical side of ladder) while the Cytosine is connected to the 3' --> 5' strand (right vertical side of ladder). These two come together at one of their ends and base pair, which appears to look like the steps on a ladder.
4 0
4 years ago
Explain why Independent assortment does not apply to some pairs of genes
sleet_krkn [62]

they have specialised cells ?

6 0
3 years ago
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