Which of the following was used in the 1940s to analyze amino acids that make up proteins? a. genetic engineering. b. chromatography. c. radioactive tracers. d. x-ray diffraction

How does natural selection change thephenotypes within a population over time?

Mitosis creates two identical daughter cells from one parent cell creates four nonidentical daughter cells from one parent cell is the most common type of reproduction for bacteria is the process by which male and female reproductive cells are created

How are primary producers important to the alligator's energy supply