If one follows 150 primary oocytes in an animal through their various stages of oogenesis, how many secondary oocytes would be formed?

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.

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

Strands of genetic material floating in the nucleus are referred to as