________ are carrier proteins embedded in the membrane that increase the rate of diffusion of specific molecules across selectively permeable membranes.
Fill in the blank(s) with the appropriate word(s).
Permeases
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ABO blood group determination is an example of
A. epistasis. B. incomplete dominance. C. polygenic inheritance. D. multiple alleles. E. pleiotropy.
The nerve net of Hydra:a
contains a central control organ and connected neurons. b. sends electrical signals in only one direction. c. allows the organism to respond to stimuli approaching from any direction. d. produces a signal that intensifies as it radiates from its point of origin. e. cannot coordinate the movement of all tentacles at once.
The process through which DNA is copied into a complementary strand of mRNA is called translation
Indicate whether the statement is true or false
The punctuated equilibrium model of evolution suggests that new species appear
A. gradually over very short periods of time so that intermediate species are often observed in the fossil record. B. gradually; as groups become isolated, they slowly evolve through their own individual pathways. C. gradually after long periods of time with little to no change; as groups become isolated, they slowly evolve through their own individual pathways. D. suddenly after long periods of time with little to no change. E. only after older species disappear from the fossil record.