All of the following are true regarding smoking EXCEPT
a. smoking inhibits the T cells from working properly in the lungs.
b. smoking is viewed by many today as being socially unacceptable.
c. research shows that the nicotine patch is no more effective than a placebo.
d. choosing a "quit date" can increase the chance of quitting successfully.
Answer: c. research shows that the nicotine patch is no more effective than a placebo.
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Lactose is a corepressor in the lac operon.
Answer the following statement true (T) or false (F)
During interphase, the chromosomes are loose and thread-like but they tightly condense in preparation for mitosis. Why?
What will be an ideal response?
Postzygotic reproductive isolation prevents
A. fertilization. B. formation of gametes by one of the parents. C. male gametes from joining with female gametes. D. All of the answer choices are correct. E. genetic exchange between populations by selecting against hybrid offspring.
In the experiment with Peacock butterflies, the
working hypothesis is that a. mimicry confuses both predator and prey. b. mimicry conveys a selective advantage to the prey. c. birds are capable of learning. d. birds are agents of evolution. e. unpalatable species display distinctive wings.