When the London underground (subway) system was built in the nineteenth century, mosquitoes moved into the tunnels and became adapted to biting the customers and small animals that inhabit the subway system. Like people, mosquitoes can freely enter and
leave through the tunnel entrances. Recently, DNA analysis and attempts to cross-breed above-ground mosquitoes with underground mosquitoes indicate that there are now two different species. The underground insects are visibly larger. Which term best describes what has happened?
A) behavioral incompatibility B) population bottleneck
C) temporal isolation D) sympatric speciation
Answer: D
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The addition of thioglycylate into a growth medium would NOT support the growth of a(n)
A) aerotolerant anaerobe. B) facultative aerobe. C) microaerophilic aerobe. D) obligate anaerobe.
What special feature of the ovum is facilitated by the production of polar bodies?
A. large size of the cell B. extra layers of plasma membrane C. triploidy D. large size of the nucleus
Which of the following is actively transcribed?
A. euchromatin B. heterochromatin C. nucleosomes
If the parents are AO and BO genotypes for the ABO blood group, their children could include which of the following genotypes?
A. AO and BO only B. AO, BO, and AB only C. AA, BB, and AB only D. AO, BO, and OO only E. AO, BO, AB, and OO only