what process will take place in a ovule if pollination has occured?

Question

why are pollen grains so numerous?

what are several factors that allow for pollination?

what comes first pollination or fertalization?

if you were a plant breeder, how would you insure cross-pollination and prevent self- pollination?

are peas derived from ovaries or ovules? Explain

please help with as many questions as possible !

thanks!

Answer 1

1. If pollination has occurred, pollination is followed by double fertilization.
2. Pollen grains are numerous because they rely on insects, wind, or other carriers for their pollen. It takes a lot of pollen to be sure that the flowers all get pollinated. Lots of the pollen goes astray.
3. Pollination has to come before fertilization. The nuclei in the pollen tube go into the cell inside the ovule for fertilization to happen.
4. A plant breeder can carry out the cross-pollination manually, transferring the pollen from one plant to the flowers of another plant using a small brush or a "bee stick". Two actions ensure that the plants are crossed instead of self-pollinated: a) the breeder removes the stamens from the pollen-acceptor flowers before the anthers are mature, and b) the breeder covers the pollinated flower with a small bag to prevent more pollen from reaching the pistil of the pollen-acceptor flowers.

5. Peas are the seeds, so they are made when the ovules develop. The pea pods are the fruits, so the pods are made by the ovaries.

Answer 2

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