Which of the following is the single most important cause of extinction?
A. loss of the ozone layer
B. habitat loss
C. nuclear accidents
D. species overexploitation
E. introduced species
Answer: B
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The optimum temperature is usually closer to the minimum temperature than the maximum temperature
Indicate whether the statement is true or false.
Which of the following is/are true about natural selection?
A. It assures the survival of every fit individual. B. It acts on genotypes rather than phenotypes. C. It always selects for more complex forms. D. On average, it favors the survival of individuals that have adaptive characteristics. E. All of the answer choices are correct.
Which of the following statements about Neisseria gonorrhoeae is FALSE?
A) It causes disease in humans only. B) The gonococci stick to epithelial cells via fimbriae and capsules. C) The gonococci secrete a protease that destroys secretory IgA. D) The gonococci induce lasting immunity. E) Infected women are often asymptomatic.
Inference-observation confusion occurs when someone
A) cannot understand your accent. B) jumps to a conclusion. C) lies about what happened. D) incorrectly assesses a patient. E) remembers events wrong.