Thailand ordered a close watch on livestock on Thursday after an outbreak of anthrax in neighboring Laos, where more than 50 suspected human cases have been reported.
Mar 28, 2024
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Spring allergies bring to mind thoughts of stuffy noses and watery eyes. But allergies actually affect many different and interconnected systems within a person's body, according to the American College of Allergy, Asthma ...
Feb 19, 2024
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A new study of Valley fever spores collected from air filters around the Phoenix metro area is helping a research team led by scientists from the Translational Genomics Research Institute (TGen), part of City of Hope, dispel ...
Feb 14, 2024
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Five countries in East and southern Africa are in the middle of outbreaks of the anthrax disease, with more than 1,100 suspected cases and 20 deaths this year, the World Health Organization said Monday.
Dec 12, 2023
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At least 17 people have died in an anthrax outbreak in southern Uganda this month, a local official told AFP Thursday, saying the situation was "under control".
Nov 30, 2023
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Melbourne lays claim to the unwanted title of being the epicenter of epidemic thunderstorm asthma (ETSA) worldwide, having experienced seven of the 26 recorded events.
Nov 3, 2023
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While the hot, dry summer may have offered a break to people with some environmental allergies, that reprieve could be over.
Oct 16, 2023
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Many people see gardening as a relaxing pastime—an easygoing way to spend hours outdoors when the weather's nice. But as a consultant in emergency medicine, I deal with all manner of medical emergencies and injuries arising ...
May 31, 2023
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About 1,000 species of mold exist and—as allergy sufferers likely know—they're everywhere.
Mar 10, 2023
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The pathogenic fungus Aspergillus fumigatus escapes elimination from surface cells of the human lung by binding to a human protein. In doing so, it is able to nest in so called phagosomes, confined areas in the lung cells, ...
Mar 8, 2023
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In biology, a spore is a reproductive structure that is adapted for dispersal and surviving for extended periods of time in unfavorable conditions. Spores form part of the life cycles of many bacteria, plants, algae, fungi and some protozoans. A chief difference between spores and seeds as dispersal units is that spores have very little stored food resources compared with seeds.
Spores are usually haploid and unicellular and are produced by meiosis in the sporangium by the sporophyte. Once conditions are favorable, the spore can develop into a new organism using mitotic division, producing a multicellular gametophyte, which eventually goes on to produce gametes.
Two gametes fuse to create a new sporophyte. This cycle is known as alternation of generations, but a better term is "biological life cycle", as there may be more than one phase and so it cannot be a direct alternation. Haploid spores produced by mitosis (known as mitospores) are used by many fungi for asexual reproduction.
Many ferns, especially those adapted to dry conditions, produce diploid spores. This form of asexual reproduction is called apogamy. It is a form of apomixis.
Spores are the units of asexual reproduction, because a single spore develops into a new organism. By contrast, gametes are the units of sexual reproduction, as two gametes need to fuse to create a new organism.
This text uses material from Wikipedia, licensed under CC BY-SA
