Answer:
Alveoli are tiny, balloon-shaped air sacs. Their job is to move oxygen and carbon dioxide (CO2) molecules into and out of your bloodstream.
Explanation:
<span>Among the following statements shown, the most accurate concerning the founder effect is that (C) </span><span>It results when a small population breakers away from a larger one. Founder Effect is defined as the reduced genetic diversity which is most likely caused </span><span>when a population is descended from a small number of colonizing ancestors.</span><span>
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This is because HIV weakens the immune system and so the body becomes more susceptible to infections or illnesses
The right answer is B.
Nitrogen fixation is done by decomposers that are prokaryotes (bacteria).
<u>Take the example of legumes.
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The different species of rhizobia bacteria, which are able to infect the roots of legumes (Fabaceae family), are specific to certain host plants. Rhizobium phaseoli infects beans (Phaseolus sp).
Bacteria cause the formation of nodules on the roots by penetrating the root hairs, and transform into larger "bacteroids". The nodules are the seat of a symbiotic activity in which the plant provides the sugars and energy from photosynthesis, and in return benefits from the amino acids that are produced there.
Pioneer species are hardy species which are the first to colonize previously disrupted or damaged ecosystems, beginning a chain of ecological successions that ultimately leads to a more biodiverse steady-state ecosystem.
