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Directions (151–155) : Read the following passage carefully and choose the best answer to each question out of the four alternatives.
Chameleons can make their skin colour change, but not because they decide to. The colour changes to help the chameleon avoid its enemies. It is a form of camouflage, a disguise that lets it blend in with its surroundings. The change is actually determined by environmental factors, such as light and temperature.
Bright sunlight causes the skin to darken. On cool nights, the colour fades to a creamy colour. The colour also changes when chameleons are excited, angry or afraid. The colour change is rapid and increases when the chameleon is handled, injured, or approached by another chameleon. There are many types of chameleons. Almost half of them are found on the African island of Madagascar. The others mostly occur in the Sahara Desert, with few in Western Asia and Southern Europe. Chameleons live in trees, where they usually eat insects. Very large chameleons may even use their sticky tongues to catch birds.
Chameleons can make their skin colour change, but not because they decide to. The colour changes to help the chameleon avoid its enemies. It is a form of camouflage, a disguise that lets it blend in with its surroundings. The change is actually determined by environmental factors, such as light and temperature.
Bright sunlight causes the skin to darken. On cool nights, the colour fades to a creamy colour. The colour also changes when chameleons are excited, angry or afraid. The colour change is rapid and increases when the chameleon is handled, injured, or approached by another chameleon. There are many types of chameleons. Almost half of them are found on the African island of Madagascar. The others mostly occur in the Sahara Desert, with few in Western Asia and Southern Europe. Chameleons live in trees, where they usually eat insects. Very large chameleons may even use their sticky tongues to catch birds.
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