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不明白的逻辑题
Caterpillars of all species produce an identical hermone called"j h" that maitains feeding behavior. Only when a caterpillar has grown to the right size for pupation to take place does a special enzyme halt the production of j h. This enzyme can be synthesized and will, on being ingested by immature caterpillars, kill them by stopping them from feeding.
which of the following, if true, supports the view it would not be advisable to eradicate argricultural pests go through a caterpillars stage by spraying cropland with the enzyme mentioned above.
答案: any argricultural pest do not go through a caterpillars stage.
any argriculturally benificial insects go through a caterpillars stage |
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