From page 98 of your student guide, which two organelles are found in both animal and plant cells?
a. lysosome and chloroplast
b. cytoplasm and cilia
c. nucleus and mitochondrion
d. cell membrane and cell wall

an adaptation is a change or process by which an organism takes to be better suited for its environment. for example; migration is a behavioral adaptation, this is needed because birds are not built to last extremely cold climates. there are different adaptations because there are different species needing to adjust to different things, bears don't migrate; they hibernate.

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.