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发布时间:2014-01-21 12:06:45  

Adaptation for survival

骆驼<CAMEL>

1. A camel can go a week or more without water, and they can last for several months without food. They can drink up to 46 litres of water at one time.

2. Camels store fat in the hump, not water. The fat can be used for energy.

5. Camels have thick(厚) lips(唇) so they can eat the prickly(带刺) desert plants with out feeling pain.

北极熊<POLAR BEAR>

。Their white fur helps them blend in with the snow and ice.

。A polar bear has a layer of fat under its skin which helps it stay warm. It also has a thick layer of fur.

。The wide(宽), large paws help a polar bear to walk in the snow.

。Polar bear have nostrils which it can close so that when it swims under water so no water can get in.

仙人掌

1. Its expanding(延伸) trunk(树干) allows it to take in and store a lot of water when water is available(可得到).

2. It does not need a lot of water to survive.

3. The flower only opens on cooler nights and is closed during the heat of midday. 企鹅

Penguins have to keep high body temperatures to remain active. They have thick skin and lots of fat under their skin to keep warm in cold weather.They also huddle(堆积) together with their friends to keep warm。The dark coloured feathers of

a penguin's back surface absorb heat from the sun, so helping them to warm up too.

青蛙

A frog's head has adaptations that help it to swallow prey. The orbits surrounding a frog's eyes do not have bottoms, when a frog swallows large prey, it can close its eyelids and drop its eyeballs down into its mouth. Then the eyeballs help push the prey down the throat of the frog.

海豚

。Streamlined to move fast, to catch food and to escape from predators 。Excellent hearing to protect itself from predators

。Very intelligent mammal

。Swims with other dolphins for company and protection

长颈鹿

Their long necks allow them to feed among treetops and spot predators.

Long, tough(强硬) tongues enable the giraffe to pull leaves from branches without being hurt by the thorns during feeding.

Giraffes have a spots on their fur so that the can camouflages (伪装) among the trees.

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