Depends on the definition of "closed flower".
If you mean a flower that is enclosed with petals which are open, such as an Orchid, then the answer would be yes. This happens with many different types of flowers, some which have special adaptations to target a specific insect pollinator.
If you mean a closed flower that has not yet opened, then the answer is almost definitely no. When the petals are closed and folded together the stigma and anthers are not yet mature; this means that even if an insect were able to get between the closed petals there sex organs of the flower would not yet be receptive to pollination.
Generally insect pollination takes place in open flowers but there are specific cases of insect pollination in closed flowers as in case of many species of Ficus, Lotus etc.
self -pollination occurs within the same flower or same plant
Pollination occurs when the pollens from the anther of a flower is transferred to the stigma of the same or another flower. This is of two types- Self-Pollination(when the pollens from the anther of a flower are transferred to the stigma of the same flower or plant) and Cross-Pollination( when it gets transferred to the stigma of flower on another plant). Pollination is brought about by the help of various factors like insects, birds,wind, water.
In order for pollination to occur, what must happen to the pollen grains is that they have to be transferred to the stigma in a flower of the same species. The stigma is the female part of the flower.
The answer is really pretty simple. Flowers that are pollinated by insects are pollinated by insects going from one flower to an other, carrying pollen from one flower to the next. Wind pollination is caused by the wind carrying pollen from one flower to an other one.Usually insect pollinated flowers have large, brightly colored petals also sweet scented nectaries at the base of the petals - some flowers may look bland but when viewed under ultra violet or infrared light are very conspicuous.The Stamen is short, with anthers firmly attached inside the flower. The Stigma is sticky and is located on the inside of the flower. Additionally the pollen grain are produced in small amounts, it is rough/ spiky and its large. This features are used to attract insects for pollination. The pollen grains are sticky and rough so it clings onto the insect's body. The Stigma is also sticky so the pollen grains remains in place and wont get carried away by the wind currents.Many, but not all dicotyledonous flowers are insect pollinated.Wind pollinated flowers are small and inconspicuous. Sometimes green or brown in color and has no scent or nectaries (such as the flowers of grass plants).The Stamen has long filaments, with anthers that hang outside the flower. The Stigma is large, branched and feathery. The pollen grains are produced in large amounts, its smooth and light hence it can be carried away by the gentlest of wind currents.Many, but not all monocotyledonous flowers and cone producing gymnosperms are wind pollinated.
No, pollination in a flower typically occurs on the stigma of the pistil. The pollen travels down the style to reach the ovary where fertilization takes place. Once fertilized, the ovary develops into a fruit containing seeds.
self -pollination occurs within the same flower or same plant
by insects
By specialized insects
Pollination occurs when the pollens from the anther of a flower is transferred to the stigma of the same or another flower. This is of two types- Self-Pollination(when the pollens from the anther of a flower are transferred to the stigma of the same flower or plant) and Cross-Pollination( when it gets transferred to the stigma of flower on another plant). Pollination is brought about by the help of various factors like insects, birds,wind, water.
The flower is to attract insects and bees, etc, and aid in cross-pollination for seeds to develop. If cross-pollination doesn't take place, there will still be a flower, but no seeds will develop.
Cross pollination happens when the pollen of one flower is placed upon the stigma of another flower, whether of the same varietyor not.
Self-pollination could take place in many different flowers like a pea flower or a daisy. ect...
Self-pollination could take place in many different flowers like a pea flower or a daisy. ect...
In order for pollination to occur, what must happen to the pollen grains is that they have to be transferred to the stigma in a flower of the same species. The stigma is the female part of the flower.
Pollen lands on the stigma, which is the sticky female reproductive part of the flower, during pollination. This interaction allows for fertilization and the formation of seeds.
the differences between a unisexual and a bisexual flower is unisexual flower- the flower may either contain stamen or a carpel. cross pollination takes place in such kinds bisexual flower - such flowers contain both stamen and carpels . there are chances of cross pollination and self pollination in such flowers.
it becomes decomdosed and returns its nutrients to the enviorment