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when an animal is dormant during hot and dry conditions.
tissue consisting of only one type of cell.
the cartilaginous flap at the top of the mammalian trachea, which closes off the entrance to the...
an alkaline watery fluid containing digestive enzymes, which is secreted into the mouth by...
the blood vessel that carries blood from the digestive tract to the liver.
a dense mat of fungal hyphae.