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8 Cards in this Set
- Front
- Back
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defining characteristic of a gymnosperm? (L7) |
1) Seeds not enclosed in a carpel (gymnosperm = ‘naked seed’) 2) Sporangia organised in cones/strobili 3)ovule with single integument (skin, husk, shell, or rind) 4) Wind dispersed pollen• Wind dispersed pollen 5) Long time between pollination and fertilization PINE CONE |
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what is the Coniferophyta Division? (L7) |
1) The Coniferophyta Division is made up of mostly evergreen trees and shrubs 2)Conifers have either needles or scale-like leaves |
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What is a Gnetophyta? (L7)
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1) branched shrubs 2) classified as gymnosperm |
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Haploid vs Diploid (L7) |
1) anything beginning with gam" ex. gametophyte is haploid 2)anything beginning with spor" is diploid except spores themselves |
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What is a megasporangium? (L7) |
1) Megasporangia (female sporangia) produce megasporocytes (megameiocytes) that yield megaspores |
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What is the archegonium? (L7) |
they are structures of the gametophyte, chamber of cells of which a female gamete is found |
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what is a Cycadophyta ? (L7) |
Sister group of all other Gymnosperms
Diagnostic characters: |
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what is a Ginkgophyta? (L7)
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Sister group of Coniferophyta + Gnetophyta Diagnostic characters: • Motile sperm cells (plesiomorphy) |
