Through which are wastes, nutrients, and gases primarily transported in a plant?
a. within the stem and roots
b. within seeds and spores
c. within spores and flowers
d. within the seeds and roots

The best answer is: a. within the stem and roots.

Seeds transport the genetic material of the plant, with the purpose of reproduction, but they do not contribute to the given plant's survival.

Flowers likewise serve reproduction, not survival.

So we can reject answers with seeds and flowers - only a remains! (and a is correct).