DDT was once considered a "silver bullet" that would permanently eradicate insect pests. Today, instead, DDT is largely useless against many insects. Which of these would have been required for this pest eradication effort to be successful in the long run?
A. Larger doses of DDT should have been applied.
B. None of the individual insects should have possessed genomes that made them resistant to DDT.
C. The frequency of DDT application should have been higher.
D. All habitats should have received applications of DDT at about the same time.
E. DDT application should have been continual.
B. None of the individual insects should have possessed genomes that made them resistant to DDT.
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Many male songbirds are brightly colored. However, the color of the birds is determined by a balance of
A. natural selection against bright colors by predation and sexual selection in favor of bright colors. B. gene flow that reduces bright colors and natural selection in favor of bright colors. C. mutations that reduce bright colors and sexual selection in favor of bright colors. D. mutations that reduce bright colors and gene flow in favor of bright colors. E. natural selection against bright colors by predation and mutations that introduce bright colors.
The movement of water across a membrane from an area of lower solute concentration to a region of higher solute concentration is called ____.
a. osmosis b. active transport c. endocytosis d. both diffusion and osmosis e. both osmosis and active transport
The zig-zags in the Keeling Curve repeat:
What will be an ideal response?
A glycerol molecule binds to three fatty acid chains to form a _______________.
Fill in the blank(s) with the appropriate word(s).