Which of the following sounds can permanently damage hearing?
a. rock concert only
b. all of the choices
c. chain saw only
d. iPod at maximum volume only
b
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Animals that hibernate during a cold season are seasonal ____
a. endotherms b. ectotherms c. heterotherms d. regulators e. metabolic activators
Penicillin G is frequently injected but not normally given orally because it is rapidly degraded in the stomach.
Answer the following statement true (T) or false (F)
Which of the following is involved in proofreading during DNA replication?
A) 5' to 3' exonuclease activity of DNA polymerase B) 3' to 5' exonuclease activity of DNA polymerase C) 5' to 3' endonuclease activity of DNA polymerase D) 3' to 5' endonuclease activity of DNA polymerase E) RNA polymerase
At the beginning of a research project on egg laying in seagulls, a researcher noted that the birds laid an average of 7-9 eggs per clutch. After studying the population for 15 generations, the researcher noted that the birds were now laying 3-4 eggs per clutch. What type of natural selection is occurring in the population of gulls?
A. directional B. stabilizing C. disruptive D. There is no selection occurring in this population.