If a heavy box represents a molecule, which of the following represents passive transport in a cell?

Box sliding down a ramp
Box being pushed up a ramp
Box kept stationary on top of a ramp
Box kept stationary at the bottom of a ramp

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.