Which of the following might lead to the generation of several incorrect PCR products?
A) An annealing temperature that is too low
B) An annealing temperature that is too high
C) Performing 30 cycles of PCR
D) Using the correct primers
E) Including an extension step
A
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Which of the following is true of innate behaviors? Innate behaviors _____
A) are only weakly influenced by genes B) occur in invertebrates and some vertebrates but not mammals C) are limited to invertebrate animals D) are expressed in most individuals in a population
Which of the following is not true of viruses?
A. Viruses replicate by binary fission. B. Viruses are acellular. C. Viruses consist of one or more molecules of DNA or RNA enclosed in a coat of protein and sometimes in other more complex layers. D. Viruses can exist in two phases: intracellular and extracellular.
When bar-headed geese fly at very high altitudes (possibly over Mount Everest!), they breathe very thin air where the partial pressure of oxygen is very low compared to that at sea level. Which of the following adaptions would help the geese efficiently
exchange gases when flying at high altitudes? A) hemoglobin that has a high affinity for oxygen B) hemoglobin that has a low affinity for oxygen C) hemoglobin that has a high affinity for carbon dioxide D) hemoglobin that has a low affinity for carbon dioxide
Doubling the chromosomes of a sterile species hybrid with colchicine or cold shock is a method used to produce a fertile species hybrid called a ________
A) autoallopolyploid B) (amphidiploid) C) autoploid D) allopolyploid E) triploid