Photosynthesis is
a chemical process that uses sunlight
to convert carbon dioxide and water into sugars, usually releasing oxygen
as a byproduct. Land plants are the most widely known photoautotrophs (they produce energy
from sunlight), along with algae and
certain bacteria. Though only a handful of organisms use photosynthesis, all
life on earth depends on this process. Cyanobacteria first appeared 3,000,000,000
years ago, and gradually oxygenated the
planet, allowing complex aerobic (oxygen-breathing)
organisms to evolve. Likewise, photoautotrophs serve as the basic terrestrial
food source.
Learn something new in fewer than 500 words.
Showing posts with label photosynthesis. Show all posts
Showing posts with label photosynthesis. Show all posts
Monday, August 22, 2011
Photosynthesis
Today on learnalittle, learn how your food feeds itself with
a look at photosynthesis.
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