What is most likely to happen if the guppy population plotted in Figure 5 is transferred into a habitat with aggressive predators?
A. The population coloration will be brighter.
B. The population coloration will be drabber.
C. The population will go extinct.
D. Either B or C is likely to happen.
E. Either A or C is likely to happen.
Ans: D. Either B or C is likely to happen.
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A beekeeper opens one of his hives. At first, only one bee gets under his suit and stings him. He is then swarmed by the rest of his bees, and ends up with several stings. Why did most of the hive attack him? Select all correct choices
A. Because the first bee produced alarm pheromones. B. Because the first bee produced trail pheromones. C. Because the first bee produced amine hormones. D. Because the first bee produced steroid hormones. E. Because the first bee produced paracrine signals.
What is the loss of fertilizer and pesticides from soil by water moving through it?
A) the pesticide treadmill B) biomagnification C) soil erosion D) runoff
The three shapes of bacteria are
What will be an ideal response?
DNA ligase ________
A) removes bases from a DNA molecule B) adds bases into a growing DNA molecule C) reconnects the bases together between the DNA strands D) cuts the DNA to produce sticky or blunt ends E) reconnects the phosphodiester linkage between bases on the same strand of DNA