Moss Life Cycle Alternation of generations Zygote created from egg & sperm.
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Transcript of Moss Life Cycle Alternation of generations Zygote created from egg & sperm.
![Page 1: Moss Life Cycle Alternation of generations Zygote created from egg & sperm.](https://reader035.fdocuments.us/reader035/viewer/2022062219/551a649b550346545e8b5c6c/html5/thumbnails/1.jpg)
Moss Life Cycle
![Page 2: Moss Life Cycle Alternation of generations Zygote created from egg & sperm.](https://reader035.fdocuments.us/reader035/viewer/2022062219/551a649b550346545e8b5c6c/html5/thumbnails/2.jpg)
Alternation of generationsZygote created from egg & sperm
![Page 3: Moss Life Cycle Alternation of generations Zygote created from egg & sperm.](https://reader035.fdocuments.us/reader035/viewer/2022062219/551a649b550346545e8b5c6c/html5/thumbnails/3.jpg)
Alternation of generationsZygote divides by mitosis to create adult sporophyte
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Alternation of generations
Haploid spores created by meiosis
![Page 5: Moss Life Cycle Alternation of generations Zygote created from egg & sperm.](https://reader035.fdocuments.us/reader035/viewer/2022062219/551a649b550346545e8b5c6c/html5/thumbnails/5.jpg)
Alternation of generations
Haploid spores released into air
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Alternation of generations
Female gametophyte creates eggs
Male gametophyte creates sperm
Spore grows into male or female gametophyte
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Alternation of generations
Sperm & egg create diploid zygote
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Alternation of generationsCycle repeats
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Group 1: Seedless, Nonvascular Plants
• Most primitive of plants
• Live in moist environments– Swimming sperm
• Examples:– Liverworts– Hornworts– Mosses
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Mosses• Because
nonvascular: Grow low to ground– Water transported by
simple diffusion
• Lack true leaves– only 1 cell thick
• Rhizoids anchor into soil
• Early inhabitant of new ecosystems (succession)
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Moss Life Cycle• Gametophyte stage
– Dominant stage; Haploid
– Looks like mat of green shag carpet
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Moss Life Cycle• Gametophyte stage
– Dominant stage; Haploid
– Looks like mat of green shag carpet
• Antheridium: produces male sperm
Male gametophyte(creates sperm)
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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)
![Page 14: Moss Life Cycle Alternation of generations Zygote created from egg & sperm.](https://reader035.fdocuments.us/reader035/viewer/2022062219/551a649b550346545e8b5c6c/html5/thumbnails/14.jpg)
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)
![Page 15: Moss Life Cycle Alternation of generations Zygote created from egg & sperm.](https://reader035.fdocuments.us/reader035/viewer/2022062219/551a649b550346545e8b5c6c/html5/thumbnails/15.jpg)
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
![Page 16: Moss Life Cycle Alternation of generations Zygote created from egg & sperm.](https://reader035.fdocuments.us/reader035/viewer/2022062219/551a649b550346545e8b5c6c/html5/thumbnails/16.jpg)
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
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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
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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
.....
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Moss Life CycleSee 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)
. .
![Page 20: Moss Life Cycle Alternation of generations Zygote created from egg & sperm.](https://reader035.fdocuments.us/reader035/viewer/2022062219/551a649b550346545e8b5c6c/html5/thumbnails/20.jpg)
Moss Life CycleSee 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)
![Page 21: Moss Life Cycle Alternation of generations Zygote created from egg & sperm.](https://reader035.fdocuments.us/reader035/viewer/2022062219/551a649b550346545e8b5c6c/html5/thumbnails/21.jpg)
Moss Life CycleSee 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)
![Page 22: Moss Life Cycle Alternation of generations Zygote created from egg & sperm.](https://reader035.fdocuments.us/reader035/viewer/2022062219/551a649b550346545e8b5c6c/html5/thumbnails/22.jpg)
Moss Life CycleSee 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)
![Page 23: Moss Life Cycle Alternation of generations Zygote created from egg & sperm.](https://reader035.fdocuments.us/reader035/viewer/2022062219/551a649b550346545e8b5c6c/html5/thumbnails/23.jpg)
Moss Life Cycle
Male gametophyte(creates sperm)
Female gametophyte (creates eggs)
zygote
capsule
stalk
Male gametophyte(creates sperm)
Female gametophyte (creates eggs)
zygotesporophyte
![Page 24: Moss Life Cycle Alternation of generations Zygote created from egg & sperm.](https://reader035.fdocuments.us/reader035/viewer/2022062219/551a649b550346545e8b5c6c/html5/thumbnails/24.jpg)
Moss Life Cycle
Male gametophyte(creates sperm)
Female gametophyte (creates eggs)
zygote
capsule
stalk
Male gametophyte(creates sperm)
Female gametophyte (creates eggs)
sporophyte....
![Page 25: Moss Life Cycle Alternation of generations Zygote created from egg & sperm.](https://reader035.fdocuments.us/reader035/viewer/2022062219/551a649b550346545e8b5c6c/html5/thumbnails/25.jpg)
Moss Life Cycle
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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.
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Kobe Kuiz1) 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?