Answer:
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<span>It has to do with the size of each molecule. One is large (double ring) and the other is small (single ring). If 2 purines would pair, pyrimidines next to them wouldn't be able to bind with each other, and if two pyrimidines would bond, there wouldn't be enough space for 2 purines next to them to fit. By having them pair with each other, the spacing along the length of DNA or RNA is kept uniform. </span>
Answer:
that b one is nucleus dont know about the a one
The time to think and calm surroundings and we are not as expected to do as much
The answer is C. This means
that adaptive radiation is occurring between the two different populations of the
same species of plant, even though they
live in the same environment/habitat. The radiation
could be due to behavioral isolation as
exhibited by the fact that both types of plants are being pollinated by different organisms