ВУЗ:
Составители:
Рубрика:
Stories and movies often show the octopus as a monster. This eight-armed
sea animal has rows of suckers and two large eyes. It looks strange and
frightening to many people. But the octopus is a timid animal. Instead of
attacking, it usually tries to hide or escape from its enemies.
The octopus has many ways of avoiding danger. Because its body is soft, it
sometimes escapes by squeezing into a small opening in the ocean floor. As the
octopus crawls or swims, its body color changes to match the rocks or shells
below it. If attacked, the octopus squirts an inky fluid into the sea. The fluid may
confuse the attacker while the octopus swims away. The octopus swims fast by
shooting water from its body.
The octopus is a mollusk called a cephalopod. Cephalopod comes from two
Creek words. It means "head-foot", and describes the main body parts of a
cephalopod. Another group of mollusks is called gastropods. Gastropod means
"belly-foot", the main body parts of gastropod. Snails and slugs are gastropods.
A gastropod has a broad band of flesh called a foot. The animal uses its
foot to push itself along the bottom.
Many gastropods live in a single shell. Others, have little or no shell. For
protection, some of these gastropods squirt dye. Others have an unpleasant taste.
Predators learn to avoid them.
Notes:
snail улитка
clam съедобный морской молюск (разинька, венерка и пр.)
shell панцирь, раковина
sucker присосок
cephalopoda головоногие
gastropods брюхоногие молюски
slug слизень полевой
Text 7
DO YOU KNOW ...
... how the fish lives in a frozen pond? We know that ice is lighter than
water, and therefore it floats. So what we call a frozen pond is a pond the
structure of which is frozen. Skaters understand it quite well. They always want
to know how thick the ice on the pond is, because they know that there is water
under it.
When we speak about fish living in a frozen pond, we mean fish living in
water which has a layer of frozen water above it. The most serious problem for
the fish is not the coldness of the water in which it lives, but how that water can
47
Страницы
- « первая
- ‹ предыдущая
- …
- 46
- 47
- 48
- 49
- 50
- …
- следующая ›
- последняя »
