Make a list of any three out breeding devices that flowering plants have developed and explain how they help to encourage cross pollination.
Answers
Answered by
5
Ahoy!!!
_____________________________________________________________
In some species , pollen is released before the stigma becomes receptive or stigma becomes receptive much before the release of pollen .
_____________________________________________________________
In some other species, the anther and stigma of the same flower .
_____________________________________________________________
The third device to prevent inbreeding is self-incapability . This is a genetic mechanism and prevents self-pollen from fertilizing the ovules by inhibiting pollen germination or pollen tube growth in the pistil .
_____________________________________________________________
Hope it helps : ]
_____________________________________________________________
In some species , pollen is released before the stigma becomes receptive or stigma becomes receptive much before the release of pollen .
_____________________________________________________________
In some other species, the anther and stigma of the same flower .
_____________________________________________________________
The third device to prevent inbreeding is self-incapability . This is a genetic mechanism and prevents self-pollen from fertilizing the ovules by inhibiting pollen germination or pollen tube growth in the pistil .
_____________________________________________________________
Hope it helps : ]
Answered by
5
Hello,
1)Dichogamy:In this case androceium and gynoceium at different time.If male matures first then the case is protandry and if female matures first then the case is protogyny.Eg.Banyan*{ficus bengalhensis}
2)Heterostyly:In some species anther and stigma are placed at different position so that pollen cannot come in contact with stigma of same flower.
3)Self incompatibility:The failure of the pollen grains either from the same flower or the other flower of the same plant,from fertilising the ovule by inhibiting pollen germination or pollen tube growth in pistil.It is genetically controlled mechanism..
Hope this helps:)
1)Dichogamy:In this case androceium and gynoceium at different time.If male matures first then the case is protandry and if female matures first then the case is protogyny.Eg.Banyan*{ficus bengalhensis}
2)Heterostyly:In some species anther and stigma are placed at different position so that pollen cannot come in contact with stigma of same flower.
3)Self incompatibility:The failure of the pollen grains either from the same flower or the other flower of the same plant,from fertilising the ovule by inhibiting pollen germination or pollen tube growth in pistil.It is genetically controlled mechanism..
Hope this helps:)
Similar questions