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Pollen is scattered by the wind or by animals.

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7y ago

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Give two ways by which pollen grains are scattered?

animal dispersal and wind dispersal


What are two ways pollen can be scattered?

Pollen can be scattered by wind, or by pollinating insects such as bees.


Name two ways that plants ensure that their pollen grains have a greater chance of reaching the female part of their flowers?

they produce a tiny tube that the pollen grains travel to the egg cell.


What contains two pollen sacs with pollen grains?

A pollen sac is found in the anther of a flower, which contains pollen grains. Each anther typically has two pollen sacs, known as microsporangia, where pollen grains are produced via meiosis.


Are pollen grains haploid or diploid if they have two nuclei the generative and the tube nuclei?

Pollen grains with generative and tube nuclei have two haploid nuclei.


Where does pollen grains form?

Pollen grains are formed within the anthers of flowering plants, which are the male reproductive structures where pollen grains develop and mature. The process of pollen grain formation is called microsporogenesis.


How do two plants fertilize?

By sending their male gametes to the female gametes through their pollen tubes after germination of pollen grains.


What best describes the relative number and appearance of the pollen grains observed using these two objectives?

Using the higher magnification objective lens will enable you to observe a larger number of pollen grains, but they will appear larger and more detailed due to the increased magnification. Conversely, using the lower magnification lens will allow you to see fewer pollen grains in the field of view, but they will appear smaller and less detailed.


Does the anther hold pollen?

Yes because pollen grains form on the tip of the anther.


How many pollen grains are deposited into the female flower?

as many that stick to the stamen. it differs from plant to plant and it also depends on how many pollen grains stick to the insect that carries it. though once the pollen grain comes into contact with the stamen a pollen tube is created to reach the ovary. then two "sperm" come from this tube and one fertalizes the egg and one become the endosperm for nutrients for the egg/seed


What happens when pollen grains land on the stigma of a flower of a different kind?

It depends. If the pollen that the plat came from is part of the other plant's family, then it is crossbred. However, if not, the pollen will not travel down through the other plant's stigma. Such as a white and red rose will make either a pink or a red rose.


Why do plants have to transfer pollen grains to other plants and how does it change genetic makeup?

Pollen grains are formed after meiosis in microspore mother cells. Neww genetic combinations are formed by crossing over which are carried to the pollen grains. The male plant has some advantageous genes in the pollen grains. Likewise gametogenesis in the ovule also takes place creating new combinations in the egg cell. When cross pollination occurs, this leads to broader genetic spectrum from two parents. Thus, the hybrid embryo produced in such seeds has more vigour due to increased heterozygocity.