What is a comparative study of the similarities and differences in the embryos of different species?

Which of the following systems in absorbing oxygen and releases carbon dioxide

Witch type of microscope is used to view very small cell components like proteins and dna?

During a fierce storm a large number of tall trees on an island are uprooted by the wind and die. most of the trees on the island are now short trees and produce seeds that grow into short trees. what concept is shown in this example? question 5 options: natural selection artificial selection genetic engineering gene splicing