Answer:
Reproductive isolation is the very factor that causes the development of what we call "species" according to the biological species concept. The reason cats and dogs are different species is that they can't mate, so we call them "reproductively isolated."
Deoxyribose sugar and phosphate group
Are nucleotides
Answer:
The geologic time scale was developed after scientists observed changes in the fossils going from oldest to youngest sedimentary rocks. ... Later, scientists used absolute dating to determine the actual number of years ago that events happened. The geologic time scale is divided into eons, eras, periods, and epochs.
Explanation:
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Mutations can happen in every stage of a cell cycle. Also most DNAs code for functional RNA not proteins. And only some mutations are beneficial not Mostly. Pay attention on the fact that in one cell we have complete set of genes but only a few of them express ( activated)