2. in what direction are substances moving during the process of secretion (in nephrons) ? explain what these substances are and why they are excreted from the body.

If the birth rate of a population of dolphins is 2.0, the death rate is 0.5, and the population size is 100, what is this dolphin's population growth?

Which of the following is a true statement? a. individuals evolve to have adaptations. b. individuals have adaptations that can change over time. c. individuals have traits that may or may not make them successful at reproduction. d. populations cant evolve, only individual organisms.

Blank is a rock with a find dark texture that makes up the oceanic crust