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Plant Classification & Reproduction

Plant Classification & Reproduction

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Plant Classification & Reproduction

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  1. Plant Classification & Reproduction

  2. Plants can be classified into 2 main groups: • Non-seed plants • mosses = no vascular systems • ferns = vascular systems but no seeds • Seed plants • Gymnosperms = complex vascular system + bare seed (cone) • Angiosperm = complex vascular system + enclosed seed within a flower

  3. Reproduction terminologyAlternation of GenerationAny life cycle that involves sexual and asexual reproduction The life cycle of all plants have 2 phases: • Asexual reproduction new plant produced from one parent plant only (genetically identical to parent) • Sporophyte  form of plant that reproduces asexually • Sexual reproduction  new plant produced by union of a male and female sex cell (NOT genetically identical) • Gametophyte form of plant that reproduces sexually (egg + sperm –--fertilization---- zygote  embryo  new sporophyte)

  4. Non-seed plant Fern have large leafy fronds, rhizomes (underground stems) and generally prefer warm moist climates. Needs water for reproduction. Life Cycle • Sporophyte – large and photosynthetic • Produces spores asexually • Gametophyte – separate small plant (1cm diameter) from the sporophyte • produces zygote sexually

  5. Seed plants Gymnosperms woody trees or shrubs (conifers) that produce seeds that are NOT in an enclosed structure. Wind needed for pollination. Life Cycle • Sporophyte = large trees that produce cones • Produces pollen and eggs • Gametophyte = microscopic plant found on specialized structure on the sporophyte • Produces seeds

  6. Angiosperms flowering plants. Can be pollinated by insects and wind. Life Cycle • Sporophyte = flowering plant • produces pollen and eggs • Gametophyte = pollen and egg found in the flowers • produces seeds

  7. … these are the parts of the flower Male reproductive part = stamen which are made up of… • filament - stalk • anther – produces pollen grains Female reproductive part = Pistil which is made up of… • style – stalk • stigma – sticky surface at tip of style • ovary – organ that contain the egg style

  8. Fern Vs. Angiosperm Comparison of their life Cycles page 279 figure 8 and page 283 figure 6

  9. Fern Angiosperm