Structurally
DNA and RNA<span> are nearly identical. As mentioned earlier, however, there are three fundamental </span>differences<span> that account for the very </span>different<span> functions of the </span>two<span> molecules. </span>RNA<span> has a ribose sugar instead of a deoxyribose sugar like </span>DNA.RNA<span> nucleotides have a uracil base instead of thymine.
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p.s (google helped)
The answer is B)<span> </span>temporal isolation.
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<span>Temporal isolation is a type of reproductive isolation, which could be prezygotic or postzygotic. Temporal isolation is prezygotic reproductive isolation since it occurs before fertilization and zygote production. Temporal isolation is result of temporal differences in breeding. In this example, the breeding season of Rana aurora lasts from January to March while the breeding season of Rana boylii lasts from April to July. So, these two breeding seasons do not coincide and these species could not mate.</span></span>
Explanation:
. Thus, new species form when individuals from diverging populations no longer recognize one another as potential mates, or opportunities for mating become limited by differences in habitat use or reproductive schedules
1. Cranial roof & cranial base
2. Frontal bone, parietal bone, temporal bones, occipital bone, sphenoid bone, ethmoid bone
3. Inferior tribunal (2), lacrimal bones (2), mandibal, maxilla(2), nasal bones (2), palatine bones (2), vomer, zygomatic bones (2)
