UNIT 4 The reproduction function Natural Science 2. Secondary Education ALTERNATION OF GENERATIONS IN A MOSS
UNIT 4 The reproduction function Natural Science 2. Secondary Education ALTERNATION OF GENERATIONS IN A MOSS.
Dec 18, 2015
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UNIT
4The reproduction function
Natural Science 2. Secondary Education
ALTERNATION OF GENERATIONS IN A MOSS
Gametophyte
Click on each pictureto find out more
The differents stages of the process
Female gamete
Male gamete
Young sporophyte
Sporophyte
Spores
Young gametophyte
Zygote
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UNIT
4Alternation of generations in a moss
Natural Science 2. Secondary Education
• This is the part of the moss that carries out sexual reproduction.
• It produces male and female gametes. The union of these gametes creates a sporophyte.
Gametophyte
Gametophyte
Male sexualorgans
Female sexual organs
Male gametes, which need water in order to reach the female sexual organs.
Female gamete
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UNIT
4Alternation of generations in a moss
Natural Science 2. Secondary Education
• The zygote is the result of the union of the male and female gametes.
• The zygote developes and produces a sporophyte.
Zygote
ZygoteYoungsporophyte
Sporophyte
UNIT
4Alternation of generations in a moss
Go back to the Start menuNatural Science 2. Secondary Education
• This is the part of the moss that carries out asexual reproduction through spores.
• It always grows on top of the gametophyte.
• It produces spores which are released, and in the right conditions develop into gametophytes.
Sporophyte
Sporophyte
Spores
Young gametophyte
Gametophyte
UNIT
4Alternation of generations in a moss
Go back to the Start menuNatural Science 2. Secondary Education
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