How do mutations lead to genetic variation? Highlight the correct answer. A. Mutations directly result in changes in an organism’s traits.
B. Mutations produce random changes in an organism’s DNA.
C. Mutations lead to a random arrangement of chromosomes during meiosis.
D. Mutations decrease the variety of traits observed in a population.

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.

Which of the following is required of a new drug?me

In trying to determine whether dna or protein is the genetic material, hershey and chase made use of which of the following facts? a) dna contains sulfur, whereas protein does not. b) dna contains phosphorus, whereas protein does not. c) dna contains nitrogen, whereas protein does not. d) dna contains purines, whereas protein includes pyrimidines.