Chpt1 lesson 3.txt
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Collection of living matter and closed by a barrier that separates the cell from its surroundings.
To cells from different parents unite to produce first cells of the new organism.
The new organism has a single parent.
Combination of chemical reactions through which an organism builds up or breaks down materials.
a signal to which an organism responds.
The process by which organisms keep internal conditions such as temperature and water content, constant to survive.
The ability of a group of organisms to change over time.
Branches of biology:
Some of the levels which life can be studied include molecules, cells, organisms, population of single kinds of organisms, communities of different organisms in an area and the biosphere.
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