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Published byEthelbert Cunningham Modified over 9 years ago
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Plant Reproduction: Seedless Plants
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Review: What are the different types of plant reproduction? Sexual reproduction – Are these cells haploid or diploid? Asexual reproduction – Are these cells haploid or diploid? Today we are learning about reproduction in seedless plants by SPORES – Which type of reproduction produces spores? SEXUAL REPRODUCTION
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What types of plants are seedless? Ferns and moss Found in cool, moist, shaded areas in the forest Usually grow near the ground Reproduce sexually by SPORES
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Life Cycles of Seedless Plants (Ferns and Moss) Plants reproduce and have a life cycle – Ex: one stage is reproduction Plants have a life cycle with 2 stages – GAMETOPHYTE STAGE Gametes = sex cells, phyte = plant – SPOROPHYTE STAGE Sporo = spores, phyte = plant
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Life Cycles: Plant Stages GAMETOPHYTE stage – Reproduction: where cells go through the process of meiosis – HAPLOID cells (HALF the number of chromosomes) SPOROPHYTE stage – Fertilization: when haploid cells combine – DIPLOID cells (DOUBLE the number of chromosomes)
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Life Cycles: Plant Stages When a plant’s life cycle alternates (changes) between gametophyte and sporophyte stages, this is called: ALTERNATION OF GENERATIONS This means that the plant changes between the two stages: – Sporophytes produce spores – When the spores mature, they are called gametophytes because they produce the sex cells (gametes) and once the gametes combine, produce the sporophyte again!
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Life Cycles: Plant Stages In ferns, spores are produced in structures called SORI These are found on the underside of leaves – Red – brown or black colored bumps – These cells have gone through meiosis to form spores and each one can grow into a new plant!
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