wind and insect pollination Flashcards
1
Q
how is a plant adapted for wind pollination
A
- exposed anther outside of the flower
- feathery stigma increasing surface area for the likelihood of a pollen grain landing
- small and light pollen grains
- no scent or nectar
2
Q
how is a plant adapted for insect pollination
A
1) brightly coloured petals
2) scent and nectar
3) sticky stigma
4) hooked pollen grains
3
Q
define cross pollination
A
when pollen travels from 1 flower to a different flower increasing variation
4
Q
define self pollination
A
when pollen falls from the anther onto the stigma of the same flower
5
Q
what are the disadvantages of self pollination
A
decreased genetic variation
increase chance of undesirable characteristics from recessive alleles
6
Q
what are the advantages of self pollination
A
preserves genomes
7
Q
how can self pollination be prevented
A
- the stigma is above the anther
- stigma and anther mature at different times
