Questions 31-40
Write NO MORE THAN TWO WORDS AND/OR A NUMBER for each answer.
Monarch Butterflies
Hibernation
Butterfly species adopt different hibernation patterns during their life cycle. Butterflies named ‘Banded Hair Freak’ hibernate in the form of an 31________. A species called ‘Dapple White’ accumulates 32________ from larval stage. Slow metabolism can help them to sort out some problems in winter. A substance is produced in the blood which may function as 33________. There are few predators because they can only survive in 34________ weather.
Migration
Monarch butterflies move to 35________ in winter. To avoid cold temperature, they migrate to the south in large groups. The survival skill can help them last for up to 36________ during a long journey. Monarch butterflies fly in daytime and stay in 37________ during night. Researchers found out that they orient by flying along the 38________. They also follow the direction of the 39________ for navigational aid. During migration, they mainly feed on flowers and cannot reproduce. Recently the annual arrival of the monarchs can be a good interest to 40________ in the region.