In aquatic plants, water passes among the tissues and provides the medium for gas exchange. In terrestrial plants, air enters the tissues, and the gases diffuse into the moisture bathing the internal cells.
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primary division of the sea, which includes the whole mass of water subdivided into neritic and oceanic zones; also pertaining to the open sea (open water)
The best description about the brain stem is: it is the most important organ of our body's survival. It connects the brain and the spinal cord, controls the vital organs like the lungs and heart and it also coordinates the many essential body reflexes.
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Scorpions and pseudoscorpions are fairly closely related, but no more so than scorpions are related to spiders, ticks and mites. ... Like all arachnids, both pseudoscorpions and scorpions have eight legs each, and chelicerae, exoskeletons and pedipalps.
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