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26 Cards in this Set
- Front
- Back
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Inflorescence
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a group of flowers
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peduncel
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when flowers are attached directly to the stem
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spike
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when flowes sit on the peduncle
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raceme
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like a spke execpt flowers are stalked on pedicles
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corymb
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flat or convex inflorence where individual flowers come from various points along the peduncle- outer flowers open first
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umbel
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pedicels of individual flowers radiate from the same point on the peduncle
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spadix
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the spathe (bract) surrounds a spike-like structures
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panicle
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repeated branching of an inflorescence
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head
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part of the flower that's made up of ray and disk flowers which sit on a flattened recepticle
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spore
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reproductive structure adapted for dispersal and surviving in unfavorable conditions; usually haploid and unicellular
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gametophyte
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haploid multicellular structure that produces gametes by mitosis
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gamete
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haploid cell that fuses with antoher gamete during fertilization in organisms that reproduce sexually
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microspore
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cell resulting from meiosis in the anther from which the pollen grain develops
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pollen
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produced with anther; made of 2 cells (tube and germ); tube cell becomes tube the the germ cell produces two sperm
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exine
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outer coating of pollen
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megagametophyte
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antoher name for the embryo sac
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antipodals
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function is to provide nutrition for the embryo
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central cell polar nuclei
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remain near the center of the embryo sec; fuse (2 nuclei each 1n) with other sperm nuclei; becomes endosperm
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double fertilization
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process in which 1 sperm (1n) fuses w/egg-zygote; 1 sperm (1n) fuses w/ polar nuclei to form endosperm
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spore genesis
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development of the spore
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gametogenesis
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development of the gamete
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integument
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becomes the seed coat; found in the embryo sac
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funiculus
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holds the ovule within the ovary (embry sac)
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micropyle
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(embryo sac) point of entry for the pollen tube
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How many nuclei and cells does a megagametophyte have?
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8 nuclei 7 cells
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How many cells does pollen have?
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2~ Tube and germ
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