Read the following text to answer questions number 54 to 57.

    The black widow spider is an extremely poisonous spider of North and South America. Only the female one is dangerous. The bite of the male is generally harmless. Although it is greatly feared, it is not aggressive and generally bites only to defend itself.

    This kind of spider has long legs and smooth, black bodies. The female spider is about twice as big as the male. It has a round, shiny, black abdomen, with a distinctive mark shaped like an hourglass on the underside. The male spider is only about half as the long as females and has more slender body. It has four pairs of red dots along the sides of the abdomen. It is rarely seen and is harmless.

    Black widow spiders primarily eat insect that they trap in their webs. They kill their prey by biting and then inserting their venom. Birds and other animals learn not to eat the spider by identifying hourglass mark on their body. The venom makes the animal sick but usually does not kill them.

What happens when an animal eats a black widow spider?