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What do male cones produce?
Male cones produce many pollen grains to enhance its reproductive rate & hence its evolutionary success
Is self-pollination the transfer of pollen grains from the anther of a flower to the stigma?
Yes, self-pollination refers to the transfer of pollen grains from the anther of a flower to the stigma of the same flower or another flower on the same plant. This process allows for fertilization without the need for pollen from a different plant, enabling plants to reproduce even in isolation. Self-pollination is common in certain plant species and can lead to the production of seeds and fruit.
Why transfer of pollengrains is relatively easy in self pollinating plants?
In self-pollinating plants, the transfer of pollen grains is relatively easy because the anthers (pollen-producing structures) are often positioned close to the stigma (the pollen-receptive part of the flower). This proximity facilitates direct contact between pollen and stigma, allowing for efficient fertilization without the need for external agents like wind or insects. Additionally, many self-pollinating species have flowers that are structured to promote self-fertilization, ensuring reproductive success even in isolated conditions.
What is advantages of a plant producing so much pollen?
Pollen protects the gametes from environmental dangers and allows the gametes to travel without water. This in turn allows the gametes to travel longer distances and to more diverse environments
What very low temperature can plants survive at?
Most plants can survive temperatures as low as 32°F (0°C). However, some plants are adapted to survive even lower temperatures, such as certain conifers that can withstand temperatures below 0°F (-18°C).
Are pollen grains formed within the stigma?
No, pollen grains are not formed within the stigma. Pollen grains are formed in the anthers of a flower's stamen. The stigma is part of the female reproductive structure of a flower, where pollen grains land and germinate to fertilize the ovules.
What do male cones produce?
Male cones produce many pollen grains to enhance its reproductive rate & hence its evolutionary success
What is the difference between a spore and a pollen grain?
Pollen grains are formed in the anthers by meiosis; seeds in the ovary by fertilizationPollen grains are very tiny, even microscopic; seeds may be as small as 1mm across to as large as 50cmPollen grains are a single cell (similar to sperm); seeds are multicellularIts function is to carry the male characteristics of the plant to fertilize the egg cell; seeds are there to develop into a new plant when the conditions are favourable
Is self-pollination the transfer of pollen grains from the anther of a flower to the stigma?
Yes, self-pollination refers to the transfer of pollen grains from the anther of a flower to the stigma of the same flower or another flower on the same plant. This process allows for fertilization without the need for pollen from a different plant, enabling plants to reproduce even in isolation. Self-pollination is common in certain plant species and can lead to the production of seeds and fruit.
What are the characteristics of self pollinated plants?
•Large,colourful petals. •scented •nectaries are present •small, sticky stigma •stamens are enclosed within the flower •anthers are fused to their bases or along their backs to the filaments •produces less pollen Pollen grains are heavy, sticky and large •complex flower structure.
Why transfer of pollengrains is relatively easy in self pollinating plants?
In self-pollinating plants, the transfer of pollen grains is relatively easy because the anthers (pollen-producing structures) are often positioned close to the stigma (the pollen-receptive part of the flower). This proximity facilitates direct contact between pollen and stigma, allowing for efficient fertilization without the need for external agents like wind or insects. Additionally, many self-pollinating species have flowers that are structured to promote self-fertilization, ensuring reproductive success even in isolated conditions.
What is advantages of a plant producing so much pollen?
Pollen protects the gametes from environmental dangers and allows the gametes to travel without water. This in turn allows the gametes to travel longer distances and to more diverse environments
Are wind pollinated flowers petals small?
Yes, wind pollinated flower petals are small, because they do not need to be showy to attract insects.
What does a pollen grain look like?
The pollen for each kind of tree or flower is distinctive to that species, so there is no definite description for what pollen in general looks like - the grains aren't even all round; the size also varies: for instance, a grain of pollen from an elm tree (which is round) is about 20 micrometers in diameter, whereas a pollen grain from a Scots pine tree is kinda kidney shaped, & measures about 40 x 60 micrometers
What very low temperature can plants survive at?
Most plants can survive temperatures as low as 32°F (0°C). However, some plants are adapted to survive even lower temperatures, such as certain conifers that can withstand temperatures below 0°F (-18°C).
Are desert rats carnivores?
Rats are omnivores and will eat almost anything from plants, grains, small animals, insects and even carrion.
Do bats have hearts?
Of corse they do. Evrey creature needs a heart to survive and live in this world. Even plants have hearts.
