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16 Cards in this Set
- Front
- Back
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Label A-J
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A; anther
B; filament C; stamen (male part) D; ovary wall E; ovary F; style G; stigma H; petals I; sepal J; carpel - female part |
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Describe how seed/fruit are formed
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zygote develops into embryonic plant with radicle and plumule
Rest of ovule->cotyledons to be food store Ovule wall=seed coat/testa Ovary wall=fruit coat |
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Why do seeds need to be dispersed?
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If they all grew in the same place, there'd be competition for water and mineral ions
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What types of dispersal are there?
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Light, small wings/parachutes
Animals - hairs/hooks catch on fur - eat fruits and pass on in faeces |
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Adaptations of a wind pollinated flower
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Feathery stigma
Anthers outside |
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Two types of pollination
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Cross pollination
Wind pollination |
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Nectaries in wind/insect pollinated flowers?
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Wind; absent
Insect; sweet smelling |
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Type of pollen in wind/insect pollinated flowers?
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Wind; large and easy to carry
Insect; Small and sticky |
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What is inside the anther?
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Pollen sac containt pollen grains
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Conditions needed for germination
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Warm temp.
Water Oxygen |
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What is the seed like when it's dispersed?
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Dry and contain little water
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Name two methods of asexual reproduction
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Runners- natural, stalk comes out and new plant produced where touches the ground
Cuttings- artificial- A piece on stem is cut and placed in compost |
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Describe the stages from germination to fertilisation
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Pollen digests through stigma
Pollen tube dissolves allowing nucleaus into ovule Pollen grain germinates and pollen tube grows down stigma and style |
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Label A, B and C
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A; Pollen lands on stigma
B; Pollen tube grows to ovule of ovaries C; Pollen nucleus enters egg and fuses with egg nucleus = fertilisation |
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Label A, B, C, D, E and F
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A; Stigma
B; Style C; Ovule D; Ovary E; Little hole F; Egg cell |
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Radicle grows .... and plumule grows ...
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Radicle grows down and plumule grows up
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