BIOL 102 Lecture Notes - Lecture 11: Chlorophyll, Vascular Cambium, Secondary Growth
Document Summary
Damaging farming practices; crop failures, widespread soil loss. Agriculture: planting seeds, cultivating soil, and harvesting crops. Annual plants: complete their life cycle in a single season. Major food crops: rapidly produced, abundant, and easily transported. Domesticated plants: growth and reproduction of wild weeds became controlled by humans. Staple crops: wheat, rice, corn, sweet potatoes, white potatoes, manioc iclicker question: Epidermal tissue: outer covering of the plant body. Xylem carries water and minerals from root to leaves. Roots: absorb water and minerals from soil through root hairs. Root hairs dramatically increase a root"s surface area for absorbing water and nutrients. Food storage is a function of all roots, but some are highly modified for storage. Stems: serve as support structures for other organs. Have a terminal bud at the apex (top) Bulbs are vertical, underground stems consisting mostly of the swollen bases of leaves specialized to store food. Wide variety of plant parts domesticated by humans.
