Which of the following is a source of water loss in humans? I) urination II) defecation III) breathing
A) I
B) II
C) III
D) I, II, and III
D
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An increase in infant mortality will _____ a population's replacement fertility rate
a. raise c. not affect b. lower
One way that antibiotic-resistant strains of bacteria arise is that patients do not follow the instructions for taking the drug. In a typical scenario, a drug may be prescribed for a week, but the patient may stop taking it after 2 to 3 days if they start to feel better. Then when the infection flares up again, they take the rest of their dose. Why would this scenario lead to drug resistance?
A. The first round of treatment gives the bacteria a chance to learn how to metabolize the drug. B. A patient begins to develop resistance to the drug. C. The body clears the drug faster, once it is exposed a second time. D. The first round of treatment does not kill the most resistant bacteria, which then increase in number. E. The first round of treatment suppresses the immune system, making the patient more susceptible to other infections.
A process which takes place at constant temperature is
What will be an ideal response?
Recent research has suggested that some pseudogenes and non-protein-coding DNA code for RNAs that affect transcription of coding regions. This suggests that
A. non-protein-coding DNA may regulate gene expression. B. pseudogenes have no function. C. non-protein-coding DNA has no function. D. pseudogenes code for proteins.