True or false: If speciation is seen primarily as a result of genetic drift, then you would expect to see a bell-shaped distribution of most phenotypic characteristics
A. true
B. false
A
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Site-specific recombinases can be used:
A. to generate synthesis of multiple copies of plasmids. B. to convert dimeric chromosomes to monomeric forms. C. in the lysogenic pathway to circularize phage DNA. D. to evade host immune systems by the process of phase variation. E. All of the choices given are true.
Besides Darwin, the theory of evolution by means of natural selection was also independently proposed by:
A. Charles Lyell. B. Karl Popper. C. Thomas Malthus. D. Peter Raven. E. Alfred Wallace.
Immersion oil increases the amount of light entering the objective lens.
Answer the following statement true (T) or false (F)
A heterozygote for a trait exhibiting incomplete dominance will
a. express the dominant trait. b. express the recessive trait c. exhibit an intermediate phenotype. d. express both alleles.