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anther
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∙ 6y ago
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What best describes the relative number and appearance of the pollen grains observed using these two objectives?
low power:100 small pollen grains high power:25 large pollen grains
Functions of anther?
The male part of the flower has a thin stalk with an anther at its tip. The anther is made up of pollen sacs which contain pollen grains. The male reproductive cells in the pollen grains fertilize the egg and the fertilized egg develops into a young plant.
What two things can vasular plants do that non-vascular plants cannot do?
vascular plants can produce pollen grains and seeds
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
Does the anther hold pollen?
the anthers have to reach the stigma to make seeds.
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.
What are the two ways in which pollen grains are scattered?
Pollen is scattered by the wind or by animals.
What best describes the relative number and appearance of the pollen grains observed using these two objectives?
low power:100 small pollen grains high power:25 large pollen grains
Where does pollen grains form?
Pollen grains develop in the anthers of the staminae. In the anthers mostly four, but sometimes only two loculi are present.
How do two plants fertilize?
By sending their male gametes to the female gametes through their pollen tubes after germination of pollen grains.
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.
Functions of anther?
The male part of the flower has a thin stalk with an anther at its tip. The anther is made up of pollen sacs which contain pollen grains. The male reproductive cells in the pollen grains fertilize the egg and the fertilized egg develops into a young plant.
How does a bee collect pollen?
I think as it lands on flowers the pollen sticks to tiny little hairs on its legs.
Give two ways by which pollen grains are scattered?
animal dispersal and wind dispersal
Is there pollen grain inside the pollen cell?
A single pollen grain contains the generative material that forms the male gametes. It also contains the material that will form the pollen tube when the pollen lands on the pistil. These are covered by a thin layer called the intine or endospore as well as a thick protective wall called the exine or exospore.
What two things can vasular plants do that non-vascular plants cannot do?
vascular plants can produce pollen grains and seeds
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.
