DNA and RNA are made of nucleic acids which have 3 parts - a sugar molecule, a phosphate group and O amino acid group
O peptide group
O base with a nitrogen
O carboxyl group

here is my answer

Explanation:

The other type of nucleic acid, RNA, is mostly involved in protein synthesis. Just like in DNA, RNA is made of monomers called nucleotides. Each nucleotide is made up of three components: a nitrogenous base, a pentose (five-carbon) sugar called ribose, and a phosphate group.

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The Correct Option is :

The correct answer is option D which is, "how human can completely exterminate a species if necessary".

Population is the individual relating to the same specie living in the same area at the same time. Like the population of the cats living in the local jungle.

Ecology is the study and observation based study of species and their relation with their natural environment.

Hence population ecology is the study of a single population with respect to their community.

So all above 3 options A, B and C are related to population ecology except option D.