Gel electrophoresis is a technique used to
a. cut DNA into pieces of vaious sizes
b. separate DNA fragments by charge and size
b. move DNA fragments from one species to another
c. make copies of chromosomes
Answer: b. move DNA fragments from one species to another
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Of the following, which does NOT
characterize a population in genetic equilibrium? a. large population size b. no mutation c. differential reproduction d. absence of gene flow e. random mating
If the age-specific fertility rate is such that 100 females of age class x would produce 50 offspring, what is the contribution of age class x to the overall population growth rate?
A. 50 B. 2 C. 0.5 D. 0.75 E. cannot be calculated with this information.
Phase 1 of the creation of life on earth was _____________________. Phase 2 was the formation of self-replicating, information containing molecules. Phase 3 was the development of a membrane, enabling metabolism and creating the first cells.
a) the formation of RNA b) the formation of small molecules containing carbon and hydrogen c) the formation of DNA d) the increase in the amount of atmospheric oxygen. e) the formation of membranes so that later cells could develop
The type of polio that involves the infection of the brain stem and medulla is
A) asymptomatic polio. B) postpolio syndrome. C) bulbar poliomyelitis. D) minor polio. E) nonparalytic polio.