What is natural selection? a process that selects variations that with survival and that spreads the variations to more offspring a process through which nature selects an individual within a population for extinction the difference in heritable traits within a population the process of nature that causes random variations to appear in the offspring of every generation

The right answer is a process that selects variations that help with survival and that spreads the variations to more offspring.

Natural selection is based on interindividual variability. It concerns traits affecting survival and reproductive success itself. The characters selected depend for the most part on the environment, the organisms, over generations, being better adapted to it (available food, predators, prey, competitors, climate, pollution, relief, etc.).

one would be wind another would be water density

hey, i believe your answer would be d. sugar ribose and the base uracil. i believe this is the answer, because rna consists of sugar ribose, adenine, guanine, cytosine, and uracil.

your first option is incorrect, because that's dna. where it consists of sugar deoxyribose, adenine, guanine, cytosine and thymine.

your second option is also incorrect, this is because sugar deoxyribose is in dna, and uracil is in rna. these two do not make sense together.

your third option being incorrect, because sugar ribose is in rna, but not the base of thymine. rna consists of uracil, not thymine.

lastly your fourth option being correct! this answer is correct, because both sugar ribose, and the base uracil are in rna! ~

answer is d. sugar ribose and the base uracil.