They don't, nothing happens. Why someone would get an allegeric reaction is for this reason. Your "disease fighters" (white blood cells) mistakes the pollen for a disease and attacks it by letting antibodies out. What the allergic reaction is, is basically an over reaction of your body fighting the substance.
Common inhaled allergens include pollen, dust, and insect parts from tiny house mites.
Nothing is known about bee pollen causing hyperactivity in humans. There are, however, many benefits to eating or using bee pollen.
The immune system reacts to substances as threats to the body health. When the allergens are inhaled the first response of the immune system is to attack and attempt to stop the particles from harming the body.
the pollen might stick to their clothes, hands/fingers and hair, which can be an easy source to find out where the person has been.
Most likely less that a day.
Robert Brown discovered the motion of moving pollen grains. Although, a theory not long after was found out by Albert Einstein was that the water particles (very hard to see, pretty much invisible) were making these pollen grains move.
Matured pollen grains contained sperm cells. When Pollen grains are sticky, you have pollen. Pollen grains are contained in the pollen sac, with the purpose of helping plants reproduce.
Matured pollen grains contained sperm cells. When Pollen grains are sticky, you have pollen. Pollen grains are contained in the pollen sac, with the purpose of helping plants reproduce.
I hate pollen! Pollen is annoying!!
There is no such sense of a pollen "rate," but there is of a pollen count. Which means the average pollen grains in a cubic meter!
the pollen tube
the function of the pollen sac is to produce pollen (pollen grains). The pollen sac is the microsporangium of a seed plant in which pollen is produced. Most plants except coniferous plants contain four (4) pollen sacs.