ECOLOGY
ORGANISMS AND THE ENVIRONMENT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The exposure of an individual lizard in the population to radiation that causes a mutation that is not passed on to its offspring.
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An unusually dry summer in the lizard population’s ecosystem.
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The introduction of an invasive predator that preys on the brightest-colored individuals in the lizards population.
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A fast-moving wildfire that burns the canopy of the trees in the lizard population’s ecosystem.
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Detailed explanation-1: -Which of the following is most likely to cause a change in the genetic traits in an isolated population of a ground-dwelling lizard? The exposure of an individual lizard in the population to radiation that causes a mutation that is not passed on to its offspring.
Detailed explanation-2: -When harmful algae rapidly increase in the Daphnia’s environment, daphnia can develop adaptations to tolerate the negative effects of the algae within 10 years. What characteristic of the daphnia allows the population to adapt to environmental change? Its small size.
Detailed explanation-3: -Lions and cheetahs prey on wildebeests that graze in the grasslands of the African savanna. What likely effect would increased rainfall over several rainy seasons have on the populations of wildebeests, lions, and cheetahs? All three populations would increase.
Detailed explanation-4: -Black walnut always wins. It exudes a chemical called juglone from its roots into the soil that is toxic to many other plants and kills them, thereby reducing competition for resources. Juglone is also leached into the soil from rainwater coming in contact with fallen walnut leaves, branches and decaying fruits.