Practice Quiz

MCAS Biology Practice

Category - Biology

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Some willow trees alter the chemical composition of their leaves when attacked by caterpillars. Compared to normal leaves,the chemically altered leaves are less nutritious and are more difficult for caterpillars to digest.Which of the following is a likely effect of this ability to alter leaf composition?
  1. Willow trees with this ability will attract more caterpillars than other willow trees.
  2. Willow trees with this ability will have a survival advantage over other willow trees.
  3. More butterflies will lay their eggs on willow trees with this ability than on other willow trees.
  4. Caterpillars that feed on willow trees with this ability will be larger than caterpillars on other willow trees.
Explanation
Answer: B - Willow trees with this ability will have a survival advantage over other willow trees.
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