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Why do flowers produce so many pollen?
Flowers produce so much pollen to increase the chances of one grain managing to fertilise.
How is pollen transported in grasses and with many trees?
Pollen in grasses and many trees is primarily transported by wind, a process known as anemophily. Grasses produce lightweight, dry pollen grains that can be easily carried over long distances by air currents. Similarly, many trees, such as pines and oaks, release large quantities of pollen into the atmosphere, allowing it to be dispersed to female reproductive structures for fertilization. This adaptation enhances cross-pollination and increases genetic diversity.
How many chromosomes are there in the male nucleus in a pineapple pollen grain?
There are 50 chromosomes in both male and female pineapple pollen grain.
How many chromosomes are there in the female nucleus of a pineapple pollen grain?
There are 50 chromosomes in both male and female pineapple pollen grain.
How many male gametes does pollen tube have?
Within a single pollen grain there are 2 sperm cells
How many male sex cells does each pollen grain contain?
One.
How grasses are pollinated?
Grasses are primarily wind-pollinated, meaning their pollen is carried by the wind from one plant to another. Grasses do not rely on insects or animals for pollination, as their flowers are typically small, inconspicuous, and lack attractive features like nectar or bright colors. This wind-driven pollination method allows grasses to easily spread their pollen over long distances to increase genetic diversity.
Why do plant produce so many pollan grains when only one pollen grain is needed for fertilization?
Because some won't find mates. To have the greatest chance of 'breeding' as many times as possible.
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
Think abot the food that some insects get from insect -pollinated plants .As well as pollen can you think of something else that will notbe found in grasses and cereals?
Many flowers produce a sugary liquid called nectar which the insects feed on.
What is pollen grain analysis?
Pollen grains are the microscopic male reproductive particles released from flowering plants. As these grains are vital for the survival of flowering species, evolution has ensured that individual species produce different types of pollen grains. Pollen grains are also made of a resistant organic material (sporopollenin) that means they are often remarkably well-preserved in sediments many thousands of years old.
What do male cones produce?
Male cones produce many pollen grains to enhance its reproductive rate & hence its evolutionary success
