the answer is A because change over tie is a steady rate
I believe is the fact that sheep insulin can be substituted for human insulin is an example of evolution based on comparative biochemistry. Comparative biochemistry is an evidence of evolution simply because by comparing DNA and RNA we are able to see how closely related organisms are. it is important to note that biochemistry is the study of the basic chemistry and processes that occurs in the cell.
Answer:
Linnaean steps.
Explanation:
About 1.2 million species have been formally described, the vast majority from the land rather than the oceans
The outer cells of a blatocyst become the <u>placenta</u>, an organ that offers protection and nourishment.
Placenta, aka afterbirth, is an organ found in a female body that forms around the baby in order to protect and feed it. It provides nourishment for the fetus, keeps it warm, eliminates any infections that may occur, and overall protects the developing baby.
With radiation and chemo therapy