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single-celled floating algae, which provide food for marine animals, such as fish and whales.
cells that are formed during secondary growth by the vascular cambium ring just to the outside...
inter-connecting strands of cytoplasm that connect the cytoplasm of adjacent plant cells across...
(also called physical digestion) the breaking down of food into smaller pieces using mechanical...
(also called the stele) the region that includes the pericycle and the vascular tissues in a...
an endocrine gland attached to the base of the hypothalamus, which secretes hormones that play a...