Which of the following examples of natural selection in action would tend to increase the genetic variation in the population?

natural selection simultaneously selects against heavy field mice (they starve during winter) and light field mice (they freeze during winter).

natural selection causes dragonflies to evolve longer tails.

natural selection acts on beak size in finches such that those individuals able to eat small, soft seeds survive through the winter.

alpine sky-pilots evolve large flowers above the timberline and small flowers below the timberline.

Alpine skypilots evolve large flowers above the timberline and small flowers below the timberline.

1. amino acid refers to the fundamental building block of proteins, comprising of an amino group and a carboxyl group.

2. catalyst refers to any substance, which increases the rate of chemical reaction without being used up in the reaction.

3. a complex molecule containing he genetic code is dna or deoxyribonucleic acid.

4. an enzyme refers to a molecule of protein, which is unique in accelerating up a particular chemical reaction in the biological systems.

5. nucleic acid refers to an sequence of sugars, phosphates, and nitrogenous bases, for example, dna and rna.

6. a protein refers to a large, composite organic molecule comprising of a huge number of amino acids associated together with the of peptide bonds.

7. rna refers to a nucleic acid that takes part in the production of proteins.

8. substrate refers to a compound, which takes part in a chemical reaction, and is chemically modified by the reaction.