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Ch 20-21 Biology
| Question | Answer |
|---|---|
| Cuticle | reduce water loss, waxy layer |
| Alternation of generations | alternate between haploid gametophyte and diploid sporophyte, meiosis produces haploid spores |
| Seeds | dormant until conditions are favorable |
| Vascular | contain xylem and phloem, true roots, stems and leaves |
| Phloem | transports food from leaves down |
| Gymnosperms | seeds in cones, conifers are most successful |
| Angiosperms | most recently evolved, seeds in fruits and flowers, 90% of all modern plants, divided into monocots and dicots |
| Modern Medicine | based on plant substances |
| Paper | made from wood pulp and other substances |
| Herbaceous plants | non woody stems |
| Compound leaf | 2 or more leaflets |
| Cactus | spines are modified leaves |
| Sapwood | vessels that conduct water (xylem) |
| Transpiration | helps pull water through the plants, influences amount of water absorbed, evaporation of water from leaves |
| Roots | convert sugar to starch |
| Phloem | carries food through plant, sieve tube cells |
| Green algae | ancestors of plants |
| Vascular tissues | system of tubes and vessels to move food and water |
| Seed coat | protects seed from drying out |
| Capsules | contain spores, mosses, liverworts, hornworts |
| Fiddleheads | young fern leaves |
| Great Plains | best wheat growing region in the world |
| Corn | world’s chief food for farm animals |
| Mesophyll | chloroplast rich cells, ground tissue |
| Dicot | vascular bundles are in a ring, parts in 4’s and 5’s |
| Monocot | vascular bundles are scattered, parts in 3’s |
| Simple leaf | undivided |
| Palisade layer | column shaped |
| Bark | phloem and cork cells |
| Cortex | outer layer of ground tissue in stem |
| Node | Where leaves connect to the stem |
| Ground tissue | in center of roots and stems provides support |
| Root Hairs | increase water absorption |
| Movement of water in a plant | adhesion, cohesion, capillary action, transpiration |
| Stomates | regulate water loss |
| Guard cells | open by swelling up with water |
| Sugar maple | seeds carried by wind (helicopters) |
| Pressure Flow model | explains the movement of sugars in plants |
Created by:
evroman
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