Pumps are transporters that are able to harness energy provided by other components in the cells to drive the movement of solutes across membranes AGAINST their concentration gradient. This type of transport is called:
A. active transport
B. free diffusion
C. facilitated diffusion
D. passive transport

Which component in a graph indicates an independent factor? a. y-axis b. x-axis c. scale

When the oxygen produced by photosynthetic plants in the water dissolves in the water, which of these is being formed?

During crossing-over, a. genetic material is exchanged between nonsister chromatids, resulting in new combinations of alleles. b. nonsister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. c. one homologous chromosome of a tetrad is exchanged with another tetrad, resulting in new combinations of alleles. d. sister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. e. genetic material is exchanged between sister chromatids, resulting in new combinations of alleles.