BIOL 1202 : Exam 3 Study Guide
Document Summary
2 main groups of flowering plants. Seedlings each have 1 cotyledon (seed leaf) In monocots the cotyledon often remains within the confines of the seed. Coleoptile- grows from the monocot, protects the leaves. Seedlings each have 2 cotyledons (seed leaves) Shoot system o o o o o o o. Relatively homogenous in structure. Continue growing longer throughout the plant"s life. Primary root: first to appear. o o o o o o. Root hairs are extensions of epidermal cells. Which increases water and nutrient intake. Provides support for the plant. Roots communicate with the shoots by hormones. Food storage is a function of all roots, but some are highly modified for storage. (ex: carrot taproots) They store excess glucose and food to survive through times when photosynthesis cannot adequately support the organism. Aboveground (aerial or prop) roots give extra support. Breathing roots conduct oxygen to waterlogging roots. o. Need diffusion of oxygen into root cells.
