Insects have a distinct set of characteristics which all must have if they are insects. They must have three pairs of legs (even though sometimes they may appear different as larvae, such as caterpillars), a set of mouth parts, and a head, thorax, and abdomen.
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The DNA in prokaryotes is contained in a central area of the cell called the nucleoid, which is not surrounded by a nuclear membrane. Many prokaryotes also carry small, circular DNA molecules called plasmids, which are distinct from the chromosomal DNA and can provide genetic advantages in specific environments.
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The testes are two oval-shaped male reproductive glands that produce sperm and the hormone testosterone.
C because our bodys are mixing chemicals
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Amino acid substitutions at the interaction interface may result in binding affinity changes, and thus affect the structure of the protein complex. ... This structural change may significantly affect the binding energy, and make the protein complex unstable
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