The GAG codon, which codes for glutamic acid, is mutated to GUG, which now codes for valine. What type of mutation is this?
A. silent
B. missense
C. nonsense
D. frameshift
E. base pair deletion
B
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Which of the following is an example of convergent evolution?
A. the blue whale and a chimpanzee both being mammals B. two different populations of humans having different amounts of pigmentation C. the African population possessing the sickle trait in areas where malaria is prevalent D. Europeans and Africans developing lactose tolerance separately after the domestication of cattle E. the African population possessing the sickle trait and the mutation in the G6PD gene in areas where malaria is prevalent
Finding an abundance of iridium in the K–Pg boundary sequence worldwide pointed to evidence that this layer was of
____ origin.
a. carbon b. organic c. geologically recent
d. prehistoric e. extraterrestrial
Unikonts are characterized by having:a
two centrioles. b. one flagellum. c. cell walls of chitin. d. micronuclei. e. cell walls of silica.
Most of the functions of a cell membrane, including transport and enzymatic function, are performed by
A) glycolipids. B) proteins. C) phospholipids. D) cholesterol.