Which of the following statements regarding a DNA double helix is true? The amount of adenine is equal to the amount of thymine,
and the amount of guanine is equal to the amount of cytosine. The amount of adenine is equal to the amount of uracil, and the amount of guanine is equal to the amount of cytosine. The amount of adenine is equal to the amount of guanine, and the amount of thymine is equal to the amount of cytosine. The amount of adenine is equal to the amount of guanine, and the amount of uracil is equal to the amount of thymine. The amount of adenine is equal to the amount of cytosine, and the amount of guanine is equal to the amount of thymine.
DNA (deoxyribo nucleic acid ) is the genetic material present in all the organisms except some viruses. DNA structure follows the Chargaff's rule.
Accoprding to Chargaff's rule, the ratio of purines to pyrimidines in a DNA molecule is equal to 1. The amount of guanine is nearly equal to the amount of cytosine whereas the amount of thymine is nearly equal to the amount of adenine.
Since fish feeds primarily on large amphipod,
therefore what we expect to remain to evolve on ponds containing fish would be
smaller amphipod or crustacean. Then correct answer to this question would be:
<span>“Ponds with fish should have smaller amphipods.”</span>
