Which description correctly identifies a nucleotide? O A nucleotide consists of a five carbon sugar bonded to a phosphate.
O A nucleotide has three main parts: a phosphate, a sugar, and a nitrogenous base.
O Nucleotides are formed by a dehydration reaction between two or more nucleic acids.
O A nucleotide consists of billions of DNA monomers that are condensed using histone proteins.
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Why does miranda have that particular vision of dr hildesheim answer?

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.

Why is a mushroom considered a heterotroph