BIOL 1113 Study Guide - Midterm Guide: Meristem, Stim, Symmetry In Biology

• School: Northeastern University
• Department: Biology
• Course: BIOL 1113
• Professor: Mary- Susan Potts- Santone

Document Summary

: ability to measure/respond to the length of day & light (seasons) Pigments that detect photoperiod (red light: phytochromes, cryptochromes/phototropin (blue light) Short day plants - flower during fall/winter (short days) Day neutral - not dependant on day length. Nastic (nutational) movements: do not depend on stimulant direction. Sleep movements (response to light and dark changes) - caused by potassium (k) Travels within phloem (response to appropriate stim. ) Synthesized in 1 part of the plant. Cytokinins promote cell division (cytokinesis) i: derivatives of adenine (root tips, prevents senescence - process of aging. Produced in the apical buds, roots, young leaves, seed embryos. Functions: flowering, retards leaf/fruit drop, seed germination. Protects seed and buds, initiates and maintains seed and bud dormancy. Brings about closure of stomata: turgor response -> opening and closing of stomata (water moves in and out of guard cells)