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Plant Reproduction

stigmapollen catcher; female
stigma pollen catcher; female
style connects stigma to ovary
anthus makes pollen
What happens to a fertilised egg cell to turn it into an embryo? Egg cell grows & divides--> ovary swells up (becomes fruit)--> seeds (eggs) contained within --> fruit ripens and bursts --> seeds disseminated
pollination pollen grains carried from anther to stigma
fertilization egg nucleus joins with pollen grain nucleus
stamen male reproductive organ; anther, filament
carpel female reproductive organ; stigma, style, ovary, ovule
egg cell female sex cell
pollen grain male sex cell
cross-pollination creates new variety; pollen from one flower carried by wind/animal to stigma of another flower
How does nature protect against self-polliation? 1. Plants have only male flowers or female flowers; 2. Pollen released, anthers split and die, stigmas mature and are ready to accept pollen
How does pollen travel? Animal or wind
Created by: ross3mlm