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28 Cards in this Set
- Front
- Back
pollen
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A fine dust that contains the sperm of seed-producing plants
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nucellus
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inner part of an ovule, in which the embryo sac develops; equivalent to a megasporangium
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micropyle
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A pore in the integuments of an ovule
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seed
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An ovule with a protective coating, encasing a mature plant embryo and a nutrient source
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seedling
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A young plant
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dioecious
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"two-housed"; male and female flowers on different plants
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megastrobilus
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in conifers, the female (seed-bearing) cone
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peduncle
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flower stalk
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cotyledon
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A "seed leaf" which develops as a part of the seed. It provides nutrients to the developing seedling and eventually becomes the first leaf of the plant.
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apical meristem
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Embryonic plant tissue in the tips of roots and in the buds of shoots that supplies cells for the plant to grow in length.
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tube cell
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the cell of a pollen grain that gives rise to the pollen tube -> micropyle
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seed-scale complex
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the numerous scales in young female cones, each has two ovules
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ovuliferous scale
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In certain conifers, the appendage or scalelike shoot to which the ovule is attached.
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pollination tube
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Represents the body of gametophyte
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ovule
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A structure that contains an egg cell.
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integuments
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layers of sporophyte tissue that envelop and protect the megasporangium in gymnosperms.
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pollen tube
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slender tubular outgrown from a pollen grain that penetrates the ovule and releases male gametes; from tube cell
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seed coat
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The outer covering of a seed
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gymnosperm
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Naked seeds
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microstrobilus
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male pollen-bearing cone
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sperm nuclei
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in each pollen tube, one pollinates 'food' other pollinates 'seed'
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cone
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woody and complex megastrobilus
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radicle
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Embryonic root
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prothallial cells
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remnants of old body of male gametophyte
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generative cell
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Divides mitotically to form 2 monoploid sperm which travel down the pollen tube to fertilize the ovule
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bract
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reduced leaf at based of cone
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pollination droplet
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In gymnosperm plants, there is a droplet of liquid on the micropyle which catches pollen and then is reabsorbed into the seed, fertilizing it.
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functional megaspore
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survival of only one of the four megaspores produced by the spore mother cell, leaving a single functional megaspore in the megasporangium
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