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17 Cards in this Set
- Front
- Back
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Define embryo
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the immature plant inside a seed
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Define seed coat
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the outer covering of a seed
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Define fruit
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the ripened ovary of a flowering seed plant
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What is an imperfect flower?
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They have either a pistil or a stamen but not both.
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What is a complete flower?
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Complete flowers have sepals, petals, stamens, and pistils.
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Define ovary
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a structure containing egg cells
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What is an incomplete flower?
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Incomplete flowers are missing either a sepal, a petal a stamen or a pistil.
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What happens during cross-pollination?
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The transfer of pollen is from one flower to the flower of another plant.
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Define pollination
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the transfer of a pollen grain to the egg-producing part of a plant
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What is a perfect flower?
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A perfect flower has both female and male parts, that is, both pistils and stamens.
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What happens during self-pollination?
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The pollen is transfered from an anther to a stigma in the same flower.
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What is seed dispersal?
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Seed dispersal is when a seed moves from the flower to a place where it can sprout.
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What is germination?
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Germination is what happens when a seed actually sprouts. The right conditions will allow a seed to germinate.
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Give three examples of how seeds are dispersed?
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Through wind, water and animals
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Explain how seeds are produced.
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A pollen grain is transferred from the anther to the stigma. On the stigma, a tube forms from the pollen grain to the ovary. A sperm travels down the tube and fertilizes the egg cell. A seed develops from the fertilized egg cell.
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What is vegetative propagation?
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When you grow new plants from pieces of a plant that already exists--such as a stem, a leaf or a root, rather than from seeds.
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Describe the difference between fertilization and germination?
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In fertilization, a sperm cell combines with an egg cell; in germination, a fertilized seed sprouts.
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