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Plants reproduction (Asexual reproduction (generation of offspring from a…
Plants reproduction
Asexual reproduction
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PROS:
- no need for pollinator
- offspring can have desirable genomes
- generally stronger progeny
- less "costly" for parents' resources
CONS:
- parent and offspring have identical genomes
(bad if environment changes)
- offspring not dispersed as far away
- offspring must grow in current environment, whether its favorable or not
Angiosperms
use flowers, double fertilization and fruit in sexual reproduction
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stamens- anthers are site where haploid microspores develop into pollen grains containing male gametophyte
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Incomplete flowers lack at least one of the basic floral organs- some are sterile or some are unisexual
Inflorescenses showy clusters of flowers and much of this diversity represents adaptations to specific pollinators
Self-fertilization
plants being able to combine their own pollen and ovule to form a zygote-
good b/c it ensures every ovule will develop into a seed
- bad b/c it doesn't increase genetic diversity
self-incompatibility- ability of plant to reject its own pollen and pollen of closely related individuals
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Pollination
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Types of pollination:
- Self-fertilizing- see in some crop plants
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