moss life cycle alternation of generations zygote created from egg & sperm

Download Moss Life Cycle Alternation of generations Zygote created from egg & sperm

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Slide 2 Moss Life Cycle Slide 3 Alternation of generations Zygote created from egg & sperm Slide 4 Alternation of generations Zygote divides by mitosis to create adult sporophyte Slide 5 Alternation of generations Haploid spores created by meiosis Slide 6 Alternation of generations Haploid spores released into air Slide 7 Alternation of generations Female gametophyte creates eggs Male gametophyte creates sperm Spore grows into male or female gametophyte Slide 8 Alternation of generations Sperm & egg create diploid zygote Slide 9 Alternation of generations Cycle repeats Slide 10 Group 1: Seedless, Nonvascular Plants Most primitive of plants Live in moist environments SSwimming sperm Examples: LLiverworts HHornworts MMosses Slide 11 Mosses Because nonvascular: Grow low to ground WWater transported by simple diffusion Lack true leaves oonly 1 cell thick Rhizoids anchor into soil Early inhabitant of new ecosystems (succession) Slide 12 Moss Life Cycle Gametophyte stage Dominant stage; Haploid Looks like mat of green shag carpet Slide 13 Moss Life Cycle Gametophyte stage Dominant stage; Haploid Looks like mat of green shag carpet Antheridium: produces male sperm Male gametophyte (creates sperm) Slide 14 Moss Life Cycle Gametophyte stage Dominant stage; Haploid Looks like mat of green shag carpet Antheridium: produces male sperm Archegonium: produces female egg Male gametophyte (creates sperm) Female gametophyte (creates eggs) Slide 15 Moss Life Cycle Gametophyte stage Dominant stage; Haploid Looks like mat of green shag carpet Antheridium: produces male sperm Archegonium: produces female egg Sperm swims through water to fertilize egg Male gametophyte (creates sperm) Female gametophyte (creates eggs) Slide 16 Moss Life Cycle Gametophyte stage Dominant stage; Haploid Looks like mat of green shag carpet Antheridium: produces male sperm Archegonium: produces female egg Sperm swims through water to fertilize egg Male gametophyte (creates sperm) Female gametophyte (creates eggs) zygote Slide 17 Moss Life Cycle Male gametophyte (creates sperm) Female gametophyte (creates eggs) zygote stalk Gametophyte stage Dominant stage; Haploid Looks like mat of green shag carpet Antheridium: produces male sperm Archegonium: produces female egg Sperm swims through water to fertilize egg Sporophyte stage Stalk grows out of the zygote Slide 18 Moss Life Cycle Male gametophyte (creates sperm) Female gametophyte (creates eggs) zygote capsule stalk Gametophyte stage Dominant stage; Haploid Looks like mat of green shag carpet Antheridium: produces male sperm Archegonium: produces female egg Sperm swims through water to fertilize egg Sporophyte stage Stalk grows out of the zygote Haploid spores created inside capsule by meiosis Slide 19 Moss Life Cycle Male gametophyte (creates sperm) Female gametophyte (creates eggs) zygote capsule stalk Gametophyte stage Dominant stage; Haploid Looks like mat of green shag carpet Antheridium: produces male sperm Archegonium: produces female egg Sperm swims through water to fertilize egg Sporophyte stage Stalk grows out of the zygote Haploid spores created inside capsule by meiosis Spores released and grow into new gametophytes..... Slide 20 Moss Life Cycle See appendix B in your text book Male gametophyte (creates sperm) Female gametophyte (creates eggs) zygote capsule stalk Male gametophyte (creates sperm) Female gametophyte (creates eggs).. Slide 21 Moss Life Cycle See appendix B in your text book Male gametophyte (creates sperm) Female gametophyte (creates eggs) zygote capsule stalk Male gametophyte (creates sperm) Female gametophyte (creates eggs) Slide 22 Moss Life Cycle See appendix B in your text book Male gametophyte (creates sperm) Female gametophyte (creates eggs) zygote capsule stalk Male gametophyte (creates sperm) Female gametophyte (creates eggs) Slide 23 Moss Life Cycle See appendix B in your text book Male gametophyte (creates sperm) Female gametophyte (creates eggs) zygote capsule stalk Male gametophyte (creates sperm) Female gametophyte (creates eggs) Slide 24 Moss Life Cycle Male gametophyte (creates sperm) Female gametophyte (creates eggs) zygote capsule stalk Male gametophyte (creates sperm) Female gametophyte (creates eggs) zygote sporophyte Slide 25 Moss Life Cycle Male gametophyte (creates sperm) Female gametophyte (creates eggs) zygote capsule stalk Male gametophyte (creates sperm) Female gametophyte (creates eggs) sporophyte.... Slide 26 Moss Life Cycle Slide 27 Slide 28 Place the steps of the moss life cycle in order, from the step started for you: __ 1___ Spores land. _______ Diploid sporophyte will grow from zygote. _______ Through water, sperm swim from antheridium (male gametophyte) to archegonium (female gametophyte). _______ Moss gametophytes grow near the ground. _______ Sporophyte will create and release spores. _______ Fertilization occurs. Slide 29 Kobe Kuiz 1)Label the parts of the diagram. 2)Using the picture answer the following: Where are spores created? Name the haploid stage. Which grows from the zygote? 3)How are the antheridia and archegonia different? Similar? 4)Meiosis begins which stage of plants? 5)Fertilization begins which stage of plants? 6)How are haploid spores created?

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