Ví dụ về việc sử dụng Pollen grains trong Tiếng anh và bản dịch của chúng sang Tiếng việt
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Pollen grains of Nigerian plants: I. Woody species.
Using a trace spore, pollen grains are identified and counted.
A man in Washington is making a database of all the types of pollen grains in the local area.
Just one plant can release as many as 1 billion pollen grains, which create future ragweed plants and cause significant seasonal allergies.
Sterculiaceae may be separated fromMalvaceae sensu stricto by the smooth surface of the pollen grains and the bilocular anthers.
Reaction to environmental allergens such as dust and pollen grains is the most common cause of irritation of the eye which leads to inflammation.
In the microsporocyte of Arabidopsis thaliana, meiosis depends on the expression of genes that facilitate DNA repair and homologous recombination.[1]The microspores divide by mitosis to produce pollen grains.
Unlike other water lilies, the pollen grains of Euryale have three nuclei.[1].
While larger pollen grains are usually filtered by hairs in the nose, the smaller pollen fragments are able to pass through and enter the lungs, triggering the asthma attack.[ 1][ 2][ 3][ 4].
Scientists have identified this switch not only in the chemical signature of stalagmites butalso in pollen grains buried in layers of mud at the bottom of lakes.
The body misinterprets the pollen grains and takes everything out of the cupboard to render them harmless, as if they were dangerous bacteria or viruses.
In the study, published in the Sept. 23 issue of the journal Science, the researchers screened more than 7,000 individual male bees and sequenced DNA from 140 orchid pollinaria,which are small packages that contain all the pollen grains produced by a single flower.
During a thunderstorm, pollen grains can absorb moisture and then burst into much smaller fragments with these fragments being easily dispersed by wind.
In gymnosperms and angiosperms, the male gametophytes have been reduced to pollen grains and in most of these the antheridia havebeen reduced to a single generative cell within the pollen grain.
Since a typical corn plant produces about 10 million pollen grains, a single plant in some lines, or strains, of the vital crop will produce mutations in every gene in its genome in one season.
We first learned this back in 1827,when Scottish botanist Robert Brown studied pollen grains in water through a microscope, and noticed that the grains contained tiny particles that moved continuously.
According to the Wedderspoon website,“KFactor 12 guarantees 65 percent of the pollen grains in the honey are Manuka pollen grains, KFactor 16 guarantees 75 percent of the pollen grains in the honey are Manuka pollen grains and KFactor 22 guarantees 90 percent of the pollen grains in the honey are Manuka pollen grains.”.
In 1827,the British botanist Robert Brown used the microscope to observe the pollen grains hanging on the surface of the water and found that these pollen particles would be continuous, fast and irregularly moving The movement is called Brownian motion.
So, that's 20 micrometers across, that pollen grain there.
A pollen grain develops from a microspore in the microsporangium and contains the male gametophyte.
When a pollen grain fertilizes an egg, it provides two sets of DNA.
When broken open, each pollen grain can release more than 500 allergy-causing granules.
That's 20 micrometers across, that pollen grain there. That's about a 50th of a millimeter.
When broken open, each pollen grain can release more than 500 allergy-causing granules.
It begins when a pollen grain adheres to the stigma of the carpel, the female reproductive structure of a flower.
The pollen grain then takes in moisture and begins to germinate, forming a pollen tube that extends down toward the ovary through the style.
The stigma receives pollen and it is on the stigma that the pollen grain germinates.
No bigger than a pollen grain, the micro-capacitor not only takes up less space and is lighter than previous efforts, but consumes less power; it should be available later this year.
Above the ovary is the style and the stigma, which is where the pollen lands and germinates to grow down through the style to the ovary, and,for each individual pollen grain, to fertilize one individual ovule.