There are twenty different types of which join together in differing sequences and numbers to form different proteins. a) fatty acids b) amino acids c) nucleic acids d) monosaccharides

B. Amino acids

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answer; ////increased water pollution; ///////////////////////

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.