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Seedless Plant Reproduction
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Sexual or Asexual Sexual Reproduction--One organism is produced by two organisms with sex cells. -The off-spring is genetically different from the parents. Asexual Reproduction--One organism produces off-spring that is genetically identical. -Plants can reproduce asexually from a leaf or a portion of a stem or root.
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Seedless Reproduction
Seedless Plants- Plants that reproduce using spores. Ex. ferns and mosses. Seedless plants can be vascular or nonvascular. Nonvascular plants--Plants that do not have roots, stems, or leaves.
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Sexual Reproduction Fertilization--The process of a sperm and an egg uniting. Females produce eggs. Males produce sperm. Zygote--the first cell of a new organism. Some plants have both male and female reproductive organs.
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Haploid and Diploid Haploid cells--Cells that have half the number of chromosomes, ex. 23 in humans. Diploid--Cells that the full number of chromosomes, ex. 46 in humans.
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Stages of the Plant Cycle
Gametophyte Stage—stage when haploid sex cells are SEPARATE. Spores—Haploid reproductive cell. (They are produced AT THE END OF SPOROPHYTE stage)
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Plant Stages cont’d Sporophyte stage--begins when an egg is fertilized by a sperm.
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Moss Cycle Gametophyte--Moss that grows along the ground.
Sporophyte--Brown structures above the moss. The diploid zygote begins the sporophyte stage and develops into an embryo that grows into a stalk capsule.
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Fern Parts Fronds--Fern leaves. Rhizome--The ferns underground stem.
Sori—where fern spores are produced. Prothallus--The small, green, heart-shaped gametophyte plant. Video Clip
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THE END
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