A mutation that affects the genotype of the organism but not the phenotype is called a

a. nonsense mutation.
b. missense mutation.
c. frameshift mutation.
d. silent mutation.


Answer: d. silent mutation.

Biology & Microbiology

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When a student manipulates a system under study, he or she is collecting ____

a. factual data b. analytical data c. experimental data d. empirical data e. observational data

Biology & Microbiology

Watson and Crick based their conclusion that DNA is a double helix mainly on experimental results and measurements from

A) Chargaff, Wilkins, and Franklin. B) Avery, MacLeod, and McCarty. C) Hershey and Chase. D) Charles Darwin.

Biology & Microbiology

In meiosis of oogenesis, how many mature eggs result?

a. one b. two c. three d. four e. five

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Birds are most closely related to

A. crocodiles. B. snakes. C. mammals. D. non-avian dinosaurs. E. amphibians.

Biology & Microbiology