Plant systems: transport, reproduction, and response

Plants have their own systems whose structures fit their jobs. For transport, xylem tubes carry water and dissolved minerals up from the roots, while phloem tubes carry the sugars made in photosynthesis from the leaves to the rest of the plant; water evaporating from tiny leaf pores called stomata helps pull water upward. For reproduction, flowering plants use flowers: pollen carries the sperm cells that fertilize ovules, which develop into seeds inside fruits, and many plants can also reproduce asexually from roots, stems, or leaves. For response, plants react to their environment through tropisms, like stems growing toward light (phototropism) and roots growing downward with gravity (gravitropism), controlled by plant hormones.

This explanation is AI-generated and can occasionally be wrong. 🚩 Report