Which of the following are true statements regarding
the use of DNA in evolutionary comparisons?
a. Lineages have a mixture of ancestral and novel
characters.
b. Mutations inevitably change those sequences
over time.
c. Mutations occur randomly.
d. Most mutations are neutral.
e. All of these are true.
Answer: e
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An egg of the organism of S. mansoni is isolated from the feces of an adult man who has been traveling in Africa. An unoperculated egg with a large lateral spine is recovered. The patient is administered the standard dose of praziquantel; however, his infection does not improve. Which one of the following statements explains this discrepancy?
a. Metrifonate should have been adminis-tered. b. Bilarcil is the drug of choice for this type of infection. c. Steroids should have been initially admi-nistered. d. A larger dose may be required to be effec-tive against this organism.
Which of the following are considered more
primitive based upon the structure of their limbs? a. bats b. reptiles c. porpoises d. penguins e. birds
Dihybrid cross
What will be an ideal response?
An increase in the number of chromosomes present in an organism is known as
A. polyploidy. B. gene flow. C. convergent evolution. D. punctuated equilibrium.