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Pollen itself is not the male gamete. [4] It is a gametophyte, something that could be considered an entire organism, which then produces the male gamete.Each pollen grain contains vegetative (non-reproductive) cells (only a single cell in most flowering plants but several in other seed plants) and a generative (reproductive) cell.
Here are the 10 best and worst cities for people with allergies. Pollen allergy seasons can be very different depending on where in the U.S. you are. ... With a combination of medication and good ...
A good predictor for when a plant will bloom and produce pollen is a calculation of the growing degree days. The color of pollen below indicates the color as it appears when the pollen arrives at the beehive. After arriving to the colony with a fresh load of pollen, the honey bee unloads its pollen from the pollen basket located on its hind legs.
Aeroplankton is made up mostly of microorganisms, including viruses, about 1,000 different species of bacteria, around 40,000 varieties of fungi, and hundreds of species of protists, algae, mosses, and liverworts that live some part of their life cycle as aeroplankton, often as spores, pollen, and wind-scattered seeds.
The metabolism of bees and humans is sufficiently different that bees can safely collect nectars from plants that contain compounds toxic to humans. The honey produced by bees from these toxic nectars can be poisonous if consumed by humans. In addition, natural processes can introduce toxic substances into honey produced from nontoxic nectar.
[7] [6] It is the fourth-largest risk factor overall for human health [8] as 99% of people are exposed to harmful levels of air pollution. [9] Outdoor particulate pollution ( PM2.5 ) is the largest cause of death (4.7 million), followed by indoor air pollution (3.1 million) and ozone (0.5 million).
Studies of the geographic distribution and seasonal production of pollen, can be used to forecast pollen conditions, helping sufferers of allergies such as hay fever. Melissopalynology: the study of pollen and spores found in honey. Archaeological palynology examines human uses of plants in the past. This can help determine seasonality of site ...
Stingless bees are valuable pollinators and contribute to ecosystem health by producing essential products. These insects collect and store honey, pollen, resin, propolis, and cerumen. Honey serves as their primary carbohydrate source, while pollen provides essential proteins. Resin, propolis, and cerumen are used in nest construction and ...