A student is moving into experimenting with a substance that moves into via cell via facilitated diffusion. The student notes that as the concentration of the substance outside of the cell increases , the rate of movement of the substance into the cell increase and then plateaus . What explains the phenomenon seen by the student?

many phylogenetic trees have a single lineage at the base representing a common ancestor. a lineage that evolved early from the root and remains unbranched is called basal taxon. when two lineages stem from the same branch point, they are called sister taxa.

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explanation:

a. suckling by young

b. hypothalamus

c. dopamine

d. trh

e. anterior pituitary

f. mammary glands

g. milk production