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a perforated wall or part of a wall at the end of one of the individual cells making up a sieve tube.
many-celled, complex organisms with cell differentiation and specialised tissues performing life...
the domain that contains prokaryotic micro-organisms. Some live in extreme environments, such as...
the teeth found at the back of the mammalian jaw. In herbivores they have broad surfaces and...
the form in which excess glucose is stored in the liver and muscles of mammals.
the cell organelle responsible for manufacturing and transporting protein and lipids.