Why are proteins considered organic molecules?
a. they contain many nitrogen atoms.
b. they contain many carbon atoms.
c. they are not used by living things.
d. they are very small.

The answer is option B "They contain many carbon atoms." Proteins are considered organic molecules because they are made up of carbon atoms. Proteins give your body energy and allows your body to run the way it does. Proteins also aren't considered organic molecules because they are small, because they are not used by living things, or because they contain nitrogen.

Hope this helps.

the organisms are not adapted to live in some communities or habitats.

your answer is "the 1950's"