the exact moment when the nuclei of the male and female gametes fuse.
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what is zona pellucida?
protective glycoprotein surrounding the egg cell membrane that sperm have to penetrate.
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how does mitochondria help sperm to move ?
it provides energy via respiration for the flagellum to move
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when does acrosome reaction occur ?
once one sperm makes contact with zona pellucida of the egg cell
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what is acrosome reaction?
digestive enzymes are released from the acrosome.,which digest the zona pellucida so sperm can move through it to the egg cell membrane of the egg cell
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what makes zona pellucida thicken and why?
chemicals from cortical granues,which.makes it impenetrable to other sperm.
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how is a diploid zygote produced in plants?
first male gamete fuses with with female gamete nucleus .
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how is a triploid zygote produced in plants?
second male gamete fuses with two polar nuclei producing a triploid primary endosperm nucleus.
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where does fertilisation take place in plants ?
in the embryo sac within the ovule
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what forms the seed's storage tissues?
a triploid cell (endosperm)
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when do males produce viable sperm?
puberty-death
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Other cards in this set
Card 2
Front
what is fertilisation?
Back
the exact moment when the nuclei of the male and female gametes fuse.
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