Pls
in a rainforest, a single howler monkey would be an example of

a. a population.
b. an organism.
c. a community.
d. an ecosystem.

I think your answer should be B. an organism. Hope this helps. =^-^=

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.