Which phrase best defines erosion? moving bits of rock and soil from one place to another

cementing layers of rock together to form stone

breaking up rocks into smaller pieces

layering bits of rocks and soil

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.

Which of the following statements about protists are true? a.they are typically found in moist environments. b.they are all unicellular. c.they have a nucleus. d.they are all multicellular.

Why has two different alleles for the same trait?