Homework - Biology - 7Б

 Read and translate.

Mammals

Mammals are one of the 6 main classes of animals.

There are only about 4,000 kinds of mammals.

Mammals are warm blooded.

The temperature could be freezing cold or boiling hot, but mammals’ bodies maintain about the same temperature all the time. Warm blood lets the mammals be very active and live in a wide variety of places.

Mammals are everywhere.  Polar bears live in very cold areas.  Camels live in hot areas.  Moles live under the ground.  Bats live in caves and fly in the air.  Dolphins live in the oceans.  Fur and fat help protect mammals who live in the cold.  Mammals sweat to release extra heat if they live somewhere hot.

All mammals have fur or hair.

Sometimes it's long hair covers their entire body

Sometimes it's very short hair.

Even mammals that swim under the water (like dolphins and whales) have hair.

Mammal Babies:  We all drink Milk!

All baby mammals drink milk that comes from their mothers' bodies.  Because the babies rely on their mother's milk to live, the mammal mommies have to care for their young.  The length of time varies from a few weeks for mice to many years for humans!

Mammal mothers are hard workers.  Baby mammals learn from their mothers.  The babies watch their mother and do the things they see her do.  Through copying their mothers, baby mammals learn everything they need to survive.

So, what do mammals eat when they grow up?  They eat all sorts of different things!  Lions are mammals who eat meat – they are called carnivores.  Cows are mammals who eat plants – they are called herbivores.  People are mammals who eat meat and plants – they are called omnivores.

Mammals are vertebrates, which means that they all have backbones (spines).

So, all mammals:

·        are vertebrates (which means they have a backbone or spine).

·        are endothermic. Also known as “warm-blooded,” endothermic animals regulate their own body temperate which allows them to live in almost every climate on Earth.

·        have hair on their bodies.

·        produce milk to feed their babies. This allows them to spend more time with their young and teach them important skills they need to survive on their own.