8) What effect is warming predicted to have on migration behavior? A) Birds will

Question

8) What effect is warming predicted to have on migration behavior? A) Birds will depart for migration earlier and return later. B) Birds will depart for migration later and return later. C) Birds will depart for migration earlier and return earlier. D) Birds will depart for migration later and return earlier. 9) I

in some regions, butterflies are emerging earlier than the flowering of herbaceous plants. This is an issue because A) butterflies rely on the flowers for food. B) butterflies rely on the flowers for shelter. C) butterflies rely on the flowers to deposit eggs. D) herbaceous plants rely on butterflies for food.

Explanation / Answer

Ans8) A) Birds will depart for migration earlier and return later. The warm spring temperatures in some regions have led to an earlier arrival of many birds. For example, British birds arrive at their breeding areas two or three weeks earlier than they did thirty years ago. Thus, they start to breed earlier. At the same time, increasing temperatures also make the vegetation bloom and insects hatch earlier. Unfortunately, these shifts are not in line with each other. The vegetation bloom and insect peak occurs even before the young birds hatch. As a result of this mismatch, the birds cannot provide enough food for their offspring.

Ans9) A) butterflies rely on the flowers for food. Butterflies emerge before the breeding season causing shortage of food.

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