What type of research method would best answer the question “How many rivers in Florida have nitrate pollution in them?”

The first signs of cellular differentiation occur in the blastocyst. why is cellular differentiation important for the development of a fully formed human infant?

The wings of insects, birds, and bats evolved independently but carry out similar functions. this is an example of a. analogous structures. b. embryonic structures. c. vestigial structures. d. homologous structures.

Temperatures in ponds and lakes vary by season. select the best answer from the choices provided t f