Sunday, 9 December 2012

????? Do You Know ?????



Some animals have the ability to regenerate their body parts. When enemies approach, these animals will confuse their enemies by losing a body part. A sea cucumber will throw out its intestines. A star fish will lose its arm. An earthworm will split itself. A lizard will discard its tail, an octopus will lose its tentacle. This reaction will not harm the animals because they will regenerate the lost body parts in a short period of time.










The polar bear has two layers of hair. The first layer consists of needle-like hair, and it’s thick and transparent. It absorbs heat from sunshine. The internal layer is short and thick. Between the fur, the trapped air keeps it from losing heat. It keeps the body of the polar bear warm so that it can survive in the north pole. 






EXERISE 2

Fill in the blanks with the correct answer

discard its tail
migrate
skin colour
hibernates
fats
humps
food
bad smell
poisonous stings
hard scales
dead
thick fur

1.    Pangolins have ___________ to protect themselves from enemies.

2.   Bedbugs have ___________ to repel enemies.

3.   Scorpions use ___________ to attack enemies.

4.   Chameleons have the ability to change their ___________ according to their surroundings.

5.   A lizard ___________ to confuse its enemies.

6.   Millipede curls up its body to pretend ____________ .

7.   A polar bear is covered with ____________ and it has a layer of ___________ to protect itself from the cold weather.

8.   The squirrel ____________ in a tree hole throughout winter because of the lack of _____________.

9.   Camels can live in deserts because they have ___________ to store fats .

10. Swallow and wild goose will ____________ to warmer places in winter.







Answer:  1. hard scales              6. dead
              2. bad smell                 7. thick fur, fats
              3. poisonous stings      8. hibernates, food
              4. skin colour               9. humps
              5. discard its tail       10. migrate

How do animal protect themselves from danger ?

Animals have different physical characteristics that protect themselves from their enemies. These include:
a)    has horns
Deer, rhinoceros and buffalo have sharp horns to fight-off and injure their enemies.






b) has sharp claws
Tiger, lion and leopard have sharp claws to fight-off and injure their enemies.




 


c) has hard scales
A pangolin and an ant eater has a hard scales as its special characteristics to protect itself.



d) has hard shell
The bodies of garden snails, clams, crabs and tortoises are covered by a hard shell. The shells help them to protect their enemies. Garden snails and tortoises can also pull their head, legs or their whole bodies inside their shell. Clams protect themselves by closing up their shells.





e) has spines
Porcupines, porcupine fish and starfish have spines on the surface of their body. The spines can injure enemies that go near or attack these animals. Porcupines raise their long, stiff spines as a warning when their enemies go near them. A porcupine fish can inflate its body by drinking a lot of water. This raises the sharp spines on the fish’s body. The spines help to keep the fish’s enemies away.











f) has sting and provide poison
Centipedes, cobras, wasps and scorpions ca defend themselves from their enemies by using their poison. Centipedes and cobras can bite their enemies to weaken or kill them. Wasps and scorpions can sting their enemies to weaken or kill them.




Besides physical characteristics, some animals also behave in special ways to protect themselves from enemies. These include:
a) pretending to be dead
Some beetles and millipedes pretend to be dead when they are attacked or threatened.



b)    giving off black ink
Squid can give off black ink that darkens the water around to confuse their enemies.


c)    changing the colour of fur or skin
The artic fox can change the colour of its fur to match the colour of its surrounding. In spring and summer, the artic fox has grey fur. Before the start of autumn and winter, its fur will change to white. By changing the colour of its fur, the artic fox can avoid being detected by its enemies easily. Chameleon can change their skin colour to match the colour of their surroundings, for example, the colour a tree trunk. This ability helps chameleons to hide from their enemies.



d)    Camouflage
Some animals have body shapes or colours that match their surroundings. This makes it easier for these animals to hide from their enemies. Leaf insects have green body parts that look like leaves. Sticks insects have along, thin body that look like a stick or twig. Their body colour is also similar to the colour of twigs. Zebras have black and white stripes on their bodies. This makes it more difficult for their enemies to spot them from a distance.



e)    living in groups
Elephants, deer, buffaloes and zebras live and move from place to place in groups (herds). This allows them to defend themselves together when they are in danger. For example, when predator tries to attack the young of the elephants, the adult elephants will form a circle and keep their young in the centre of the circle.