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liquid which fills the spaces around the cells. It is derived from blood plasma but lacks the cells and large proteins found in blood plasma.
list of questions or statements that are used to classify or identify a living organism.
the use of modern technology to manipulate living organisms to obtain products from them that...
a very long time span in the Earth's history, covering tens or hundreds of millions of years....
(also called a glacial age) a long period of low temperature on Earth, during which large sheets...
the protection of species, habitats and ecosystems and the management of natural resources.