When comparing the DNA sequences from two individuals, you notice that an adenine at position 513 in one species is a cytosine in the other species. This is an example of:
What will be an ideal response?
ANS:
transversion or point mutation
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Individuals who have recovered from tetanus are not immune to the disease and must be immunized
Indicate whether this statement is TRUE or FALSE.
Most animals show ____ symmetry
a. bilateral b. multilateral c. no d. radial e. unilateral
A mutation in a ribosome binding site in the lac operon would likely result in
A) reduction in the amount of LacZ, LacY, or LacA protein. B) reduction in the amount of LacZ, LacY, and LacA proteins. C) complete loss of transcription of the lac operon. D) a lac mRNA that is shorter than wild-type.
Does the ability to disperse over long distances lower a species' chance of extinction?
a. Yes, as data on Cretaceous gastropods show that species with higher dispersal ability have lower extinction rates. b. No, there is no relationship between a species' dispersal ability and its range. c. Not necessarily, this is only the case if species range correlates positively with dispersal abil-ity. d. No, in Cretaceous gastropods species with long range dispersal have an increased chance of extinction.