BIOL 1202 : Exam 3 Notes
Document Summary
Monocots: ex: corn, 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. Dicots (eudicots: ex: bean, seedlings each have 2 cotyledons (seed leaves) Shoot system: flower, terminal bud (shoot apex, node/internode, axillary bud, terminal bud of branch, vegetative branch, leaf, petiole, blade, negative geo-trophism. Root system: relatively homogenous in structure, taproot, lateral roots, continue growing longer throughout the plant"s life, positive geo-trophism. Primary root: first to appear: dicot- taproot system, monocot- fibrous root system, root hairs are extensions of epidermal cells. Aboveground (aerial or prop) roots give extra support. Breathing roots conduct oxygen to waterlogging roots: cypress knees. When you over-water a plant, you are essentially suffocate the roots, depriving them of oxygen. Epiphytes- plants that live on the outside of other plants: the roots of many orchids are photosynthetic. Simple leaf: single axillary buds (meristem cells, petiole, blade.
