What factor is most important in the cell differentiation that occurs during the metamorphosis of a tadpole into a frog A. the frequency with which females are able to reproduce

B. the expression of different genes at different times

C. the variation in temperature at a given time of year

Ascientist and her team counted 200 individual deer in an area of 10 square kilometers. what is the population density?

What causes an unsaturated fatty acid to have a different shape than a saturated fatty acid? o a. unsaturated fatty acids have more hydrogen atoms. o b. unsaturated fatty acids have double carbon bonds. o c. unsaturated fatty acids have more nitrogen atoms. o d. unsaturated fatty acids have single carbon bonds.

The earth consists of a variety of different organisms. despite their diversity, however, some similarities on the structural and metabolic levels may be seen. these similarities can be attributed to a. similarities among organisms in their proteins and nucleic acids. b. the ability of organisms to readily adapt to sudden environmental changes. c. similarities in organisms' habitats and niches. d. the ability of all organisms to interbreed and produce new species.