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Complete the sentences to describe the different levels of organization in organisms.
A(n)
v is a group of organs that work together to perform a common function.
A(n)
- is a group of tissues that work together to perform a common function.
A(n)
is a basic unit of structure and function of all living things.
A(n)
v is a group of cells that work together to perform a common function.

the generally accepted parts of modern cell theory include: all known living things are made up of one or more cells. all living cells arise from pre-existing cells by division. the cell is the fundamental unit of structure and function in all living organisms.

b. lithosphere, asthenosphere, mesosphere   is the answer most likely

not necessarily. higher fitness requires the organism to be reproductive successful. for example, an organism at age 10 with 15 offspring is much more fit than an organism at age 15 with only 5 offspring.

answer; nociceptive pain;