BIOL 1002 : Bio Notes Test 3 (Ch. 31,32,33,34,43)
Document Summary
****plant parts pic**: terminal buds generally exercise apical dominance over axillary buds (control, undifferentiated meristematic(stem) cells occur in buds, tips of the roots, whole plant growth is indeterminate, but growth of some organs is determinate. Leaves: arid-adapted plants have succulent leaves, leaves specialized into spines help defend against herbivores, leaf hairs (trichomes) help reduce water loss and provide some protection against herbivores. Venus fly trap: 2 trigger hairs must be touched in succession within 20 seconds of each other or one hair touched twice in rapid succession; south carolina. When a cell divides, the 2 daughter cells grow (1) make new cells (2) grow bigger; and they differentiate (specialize), depending especially on where they are located during development. Wood = secondary xylem: heartwood: no longer conducts water, but strengthens stem. ***aquaporin forms a pore in the membrane specific to water **: sapwood: conducts water and minerals, heartwood, sapwood, vascular cambium, secondary phloem, cork cambium, cork (inner to outer)
