how does a vascular plant's phloem differ from its xylem?

a. phloem is found only in the leaves.

b. only phloem transports water.

c. only water flows through phloem.

d. phloem has a two-way flow of materials,

D. Phloem has a two-way flow of materials,

Explanation:

Only D is the correction option. Food can flow in each direction of phloem. By contrast, water flows in one direction in xylem.

It is incorrect to say that phloem is only found in leaves, and it only transport water.

answer; the correct answer is conflict- related aggression; +

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.