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BSC2011- Practical 2
Plants, and other things
| Question | Answer |
|---|---|
| Chlorophyta | Green algea. They have unicellular, filamentous, colonial, multicelluar plate like forms that live in fresh water. They can reproduce via sex or not. |
| Chara | stonewart- antheridium, egg, sperm cells |
| Spirogyra are filamentous green algea commonly found | in green mosses on the surfaces of ponds and streams. There chloroplasts are arranged as a spiral with the cells. Several cells comprise a filament and as the magnified veiw shows |
| Bryophyta (Liverworts, hornworts and mosses) | lack vascular tissue; rhizoids; homosporous (bisexual gametopyte) |
| Psilotophyta (wisk ferns) [Vascular Plants] | true roots and leaves are absent but vascular tissue presnet; rhizome and rhizoids present |
| Lycophyta (club mosses, spikemosses, and quillwarts) | sporangia borne on sporophylls; homosporous or heterosporous (unisexual gametophyte); many are epiphytes |
| Sphenophyta (Equisetophyta); horestails | Epidermis embedded with silica; tips of stems bear conelike structures containing sporangia, most are homosorous |
| Pterophyta (Ferns) | Fronds as leaves; underground roots coming off of rhizomes; most homosporous |
| Seed Plants; cycadophyta (cycads) | heterosporous, pollen adn see cones borne of different plants, palm like leaves |
| Ginkgophyta (ginko) Seed Plants | heterosporous, seed-producing deciduous, fan-shaped leaves |
| Confierophyta (confiers or Pinophyta) Seed Plants | heterosporous; pollen and see cones same plant; needlelike or scale like leaves |
| Bryophyta mosses have reproductive setting | capsule of sporophyte, stalk and gametophyte bottom |
| Selaginella (a -----) sp. withstands long periods of drought... | Lycophyta; in a dormant state. When rain returns, the plant becomes lush, green and photosnythetic within only a few hours. |
| Resurrection fern grows on tree branches in Florida. When conditions are dry, the fern looks brown and dead, but as soon as it rains,.. It is in the phylumn- | the fern unfurls and becomes green and lush. Pterophyta. |
| Tree fern fronds. There are nearly a thousand tree fern species, which grow mainly in the Southern Hemisphere and the tropics. | Pterophyta |
| Platycerium: Staghorn Fern | Pterophyta |
| The whisk ferns are small plants which branch dichotomously, which is characteristic of many primitive vascular plants. | Psliophyta |
| Horsetails are represented by only a single genus Equisetum, with perhaps 15 species. Horsetails have a very distinct appearance. The stems are ribbed with conspicuous nodes, or joints. Small microphyllous leaves cluster around each node. | Spenophyta (Equisetophyta) |
| This heart-shaped fern prothallium is a free-living, photosynthetic, haploid gametophyte | looks like a blop chocalate chip cookie |
| Ferns are | cycads |
| Cycads are dioecious, and most species produce | terminal strobili. |
Created by:
kccroy
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