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6 Cards in this Set
- Front
- Back
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Give some characteristics of angiosperms |
Flower organ Ovule is fully enclosed within the carpel Double fertilisation, producing endosperm in the seed Carpel and surrounding tissue may become a fruit Frequently insect-pollinated |
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In sexual reproduction, where does the sperm have to swim from and to? |
From the antheridium to the archegonia |
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In tracheophytes, the gametophyte is a what? |
A free-living organism which develops from a spore |
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Give a feature of angiosperms’ ovules |
They are fully enclosed within ovaries and pollen tube sperm delivery |
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How long ago did terrestrialisation occur? |
460-400 million years ago |
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Describe the plant types present at the following times: 300 million years ago, 230-120 million years ago, 90 million years onwards. |
300 Ma - lycophyte dominated forests 230-120 Ma - gymnosperm dominated ecosystems (forests dominated by conifers etc.) 90 Ma - angiosperm dominated ecosystems |
