Plant Reproduction: Seedless Plants<br />8SCIENCE: Mon. Mar. 7thand Tues. Mar. 8th<br />
Review: What are the different types of plant reproduction?<br />Sexual reproduction<br />Are these cells haploid or diploid?<br />Asexual reproduction<br />Are these cells haploid or diploid?<br />Today we are learning about reproduction in seedless plants by SPORES<br />Which type of reproduction produces spores?<br />SEXUAL REPRODUCTION<br />
What types of plants are seedless?<br />Ferns and moss<br />Found in cool, moist, shaded areas in the forest<br />Usually grow near the ground <br />Reproduce sexually by SPORES<br />
Life Cycles of Seedless Plants (Ferns and Moss)<br />Plants reproduce and have a life cycle<br />Ex: one stage is reproduction<br />Plants have a life cycle with 2 stages<br />GAMETOPHYTE STAGE<br />Gametes = sex cells, phyte = plant<br />SPOROPHYTE STAGE<br />Sporo = spores, phyte = plant<br />
Life Cycles: Plant Stages<br />GAMETOPHYTE stage <br />Reproduction: where cells go through the process of meiosis<br />HAPLOID cells (HALF the number of chromosomes)<br />SPOROPHYTE stage<br />Fertilization: when haploid cells combine<br />DIPLOID cells (DOUBLE the number of chromosomes)<br />
Life Cycles: Plant Stages<br />When a plant’s life cycle alternates (changes) between gametophyte and sporophyte stages, this is called: <br /> ALTERNATION OF GENERATIONS<br />This means that the plant changes between the two stages:<br />Sporophytes produce spores<br />When the spores mature, they are called gametophytes because they produce the sex cells (gametes) and once the gametes combine, produce the sporophyte again!<br />
Life Cycles: Plant Stages<br />In ferns, spores are produced in structures called SORI<br />These are found on the underside of leaves<br />Red – brown or black colored bumps <br />These cells have gone through meiosis to form spores and each one can grow into a new plant!<br />
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