Jellyfish

Multiple-choice exercise

Read the text and choose the correct word for each blank.

Jellyfish

A (1) jellyfish is a saucer fringed with stinging tentacles. This form is called a medusa after the (2) woman in a Greek myth who was loved by the god of the sea and as a result had her hair changed by a (3) goddess into snakes. Jellyfish are constructed from two layers of cells. The jelly which separates them gives the organism a degree of rigidity needed to withstand the buffeting of the sea. They are quite (4) creatures. Their cells, unlike those of the sponge, are incapable of (5) survival. Some are modified to transmit electric impulses and are linked into a network which amounts to a (6) nervous system; others are able to contract in length and so can be considered as (7) muscles. There are also stinging cells with coiled threads inside them, the (8) possessions of the jellyfish tribe. When food or an enemy comes near, the cell discharges the thread which is armed with spines like a miniature harpoon and often loaded with poison. It is these cells in the tentacles that will sting you if you (9) brush against a jellyfish when swimming.