Open Reading Frames include the start and stop codons for a protein
Indicate whether the statement is true or false.
T
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What evolutionary force is definitely not responsible for generating the obvious differences between races?
A. genetic drift B. natural selection C. sexual selection D. gene flow
Morphological characteristics are widely used for taxonomic classifications because
a. they are the most likely indicators of evolutionary relationships. b. they are the most likely to represent reproductive isolation among groups. c. they are easy to assess in living, preserved, or fossilized specimens. d. they are always the exact phenotypic expression of genotypes. e. they indicate genetic relatedness.
If melanocyte-stimulating hormone were increased, you would expect
a. changes in kidney function for retention of water. b. increase in reproductive or estrus cycles. c. increase in heat loss from the body surface. d. increase in pigmentation in the skin. e. decrease in milk production in females.
The first barrier to invasion is
a. antibody production. b. intact skin and body cavity linings. c. direct attack by white blood cells. d. innate immunity. e. development of memory cells.