insect pollination flowers comparatively produce less pollen grain because the insects are sure to land on other flowers in search of nectar. therefore they produce less quantities so that there is no excess pollen grain produced.
Why do wind pollinated flowers produce more pollen than insect-pollinated ones?
The pollen grains are very small and light so they are easily carried on the wind. A lot of pollen is produced, which increases the chances of a pollen grain reaching the stigma in another flower.
What are the differences between insect-pollinated flowers and wind pollinated flowers?
Wind and insect pollination
Wind-pollinated plants let their pollen blow in the wind and hope that their pollen grains reach another plant for pollination. Insect-pollinated plants use insects and other animals to carry their pollen grains to other plants.
Why wind and water pollinated flowers produce enormous amount of pollen when compared to the number of ovules available for pollination?
Pollen grains coming in contact with the stigma is a chance factor in both wind and water pollination. To compensate for this uncertainties and associated loss of pollen grains, the flowers produce enormous amount of pollen when compared to the number of ovules available for pollination.
Why flowers produce very large numbers of pollen grains and only a few ovules?
Insect-pollinated flowers produce less and larger pollen grains than wind-pollinated flowers. Less because insects are much more efficient pollinators than the wind.
Why do many flowers pollinated by insects produce sweet nectar?
Most insects pollinated flowers are sweet smelling because they produce nectar. Nectar is produced to attract the insects with the smell and have them, and in the whole process, while the insect is busy enjoying the nectar, the sticky pollen sticks to its body.
Which type of pollen grains are found in insect-pollinated flower?
Insect pollinated flowers have bright coloured petals, and they have a pleasant smell. The pollen grains are lighter in weight so that they can be carried out easily. The pollen grains are larger and are sticky so that the insects can carry it with ease. These flowers have a feathery stigma with petals hanging out.
Why do pollen grains only produce tubes in flowers of their own species?
Why do pollen grains only produce tubes in flowers of their own species? … Pollen grain too large to fit down stigma and go down the style. Explain how the pollen tube grows down through the style. If pollination is successful, a pollen grain germinates and a pollen tube grows down the style toward the ovary.
Why insect-pollinated flowers are brightly Coloured?
In order to attract insects, insect-pollinated flowers are often brightly coloured, have scent and nectar so that the insect comes into the flower and collects or leaves pollen.
Why do plants produce so many pollen grains?
In order to reproduce, plants need to be pollinated, and this is the reason that they produce pollen. Without pollination, plants will not produce seeds or fruit, and the next generation of plants.
Why do plants produce large amount of pollen grains?
Pollination takes place through different agents. … Hence,a large quantity of pollen grains must be produced to ensure that atleast some of the pollen grains reach the female stigma for a successful pollination.
Why do the cross pollinated flowers produce huge quantities of pollen grains?
Explanation: The wind pollinating plants produce numerous light weighted pollen grains so that they can easily be blown by the air and may cause cross-pollination between different plants belonging to the same species.
Why does a flower have more pollen grains than ovules?
Flowers produce more pollen grains than ovules. The reason for this is because of the pollen needing to be transported. The pollen grains are small and many will be lost in the transportation process before reaching the female reproductive parts.
Why pollen grains are many in number give reason?
In wind pollinated plants the chances of loss of pollen grains are more due to which most of the pollen grains fail to reach the appropriate stigma. So to compensate this loss and increase the chances of pollination the wind pollinated flowers produce large number of pollen grains.