1. Look again at the six embryos in their earliest stages. Describe the patterns you see. What
physical similarities exist between each of the
embryos?

9. the history of life on earth is recorded in

What is it called when part of a cell membrane closes around a molecule to allow the molecule to enter the cell? a. passive transport b.diffusion c. endocytosis d. exocytosisc. endocytosis

Select the correct answer. what does the hardy-weinberg principle relate to? a. chances of survival of an organism b. frequency of alleles in a population c. natural selection in a species d. causes of evolution among organisms