Based on the way natural selection works, what is the best way to make use of antibacterial soap?
A) Always use it because most bacteria will cause illness.
B) Never use it because all bacteria are harmless.
C) Never use it because bacteria will evolve to become resistant to it.
D) Always use it because it is unlikely that bacteria will evolve to become resistant to it.
E) Use it only when you need to be free of bacterial contamination, so bacteria will be less likely to evolve resistance to it.
E
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In the experiment performed by Benzer for intragenic mapping which of the following is the most critical control?
A. Perform the experiment with each different virus alone to determine the rate of reversion mutation B. Re-type the strain of E. coli C. Test the agar to make sure it can support E. coli and viral growth D. Perform at least five dilutions to make sure the dilutions were performed correctly
What is the effect of stress on a population?
a. Plants compete less with each other in stressful environments. b. Plants compete more with each other in a stressful environments. c. Only abiotic factors contribute to environmental stress. d. Stressful environments brought about by humans do not affect populations. e. Stressful environments brought about by nature do not affect populations.
How many covalent bonds can an individual carbon atom form?
a. 1 b. 2 c. 4 d. 8
How will DNA replication be affected if DNA polymerase I has a mutation that inactivates 5'-to-3' exonuclease activity?
What will be an ideal response?