雅思阅读真题+题目+答案：poisonous animals

雅思阅读真题+题目+答案：poisonous animals

雅思阅读真题原文如下：

Often benign and beautiful, there are so many potential dangers, often lethal, hidden in the natural world that our continued existence on the planet is actually quite astounding. Earthquakes, tsunami and volcanoes are some of natures more cataclysmic risks, but fade in comparison to the dangers presented by the more aggressive flora and fauna around the world.

There are two classes of creature that use chemicals in either attack or defence, but it is important to draw a distinction between those that are considered poisonous and those that are venomous. A poisonous creature is one that has a chemical component to dissuade potential predators; they usually secrete toxins through their skin so that their attacker is poisoned. A venomous creature, on the other hand, is not so passive – they use toxins not in defence but in attack. This differentiation is often seen in the colouring of the creatures in question – those with poisonous toxins are often brightly coloured as a warning to potential predators, whereas those classed as venomous are often camouflaged to blend in with their surroundings, making them more efficient hunters.

One of the most poisonous animals know to man is the poison arrow frog, native to Central and South America. Secreting poison through its skin, a single touch is enough to kill a fully grown human (in fact, the frog earned its name from the practice of putting tiny amounts of this poison onto blow darts used by the native population mainly for hunting and, historically at least, also for battle). It is interesting to note, however, that when bred in captivity, the dart frog is not actually poisonous – it generates its protection from its diet of poisonous ants, centipedes and mites.

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Questions 13-15

According to the information in the passage, classify the following information as relating to:

A   Poisonous creatures

B   Venomous creatures

C   Both poisonous and venomous creatures

Write the correct letter, A, B or C in boxes 13-15 on your answer sheet

13 __________ are protected by secretions on their skin.

14 __________ are often colored to match the environment.

15 __________ aggressively use toxins.

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