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| Articles by SM Bakhtiar |
471. When does a worm turn
June 08, 2013
When does a worm turn?
If the earthworm detects an unfamiliar object next to its skin, the muscles will contract immediately and the body will turn to avoid the object the worm will also turn in response to heat and, in a lesser degree, to light and sound.
Even the heat giv...
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472. Why does the spider famlly bear the name Archnida
June 08, 2013
Why does the spider famlly bear the name Archnida?
Ages ago, people believed there was magic in the weaving of a spider's web and the Greeks told a story about a girl, Arachne, who was to give all spiders the name of Arachnida.
One day, Arachne, who was skilled in the art o...
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473. Where does caviare come from
June 08, 2013
Where does caviare come from?
Caviare is the roe of the female members of the sturgeon family. These fish are found in northern and central Asia, Europe and North America.
The best quality black caviare comes from sturgeon caught during the winter months in the estuaries of...
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474. Why do African elephants have bigger ears than Indian elephants
June 08, 2013
Why do African elephants have bigger ears than Indian elephants?
African elephants have larger ears than Indian or Asiatic elephants because they live in hotter conditions; and are bigger and more aggressive and active. The huge ears of the African elephant, sometimes three and a half feet w...
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475. Why do some plants capture insects
June 08, 2013
Why do some plants capture insects?
Some plants capture insects and other tiny animals and use them as food. They do not devour their prey by chewing but decompose them in a mixture of enzymes. The pitcher plant attracts an insect to its large showy leaf by means of sweet-smelling nectar. Th...
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476. When does a cow start to give milk
June 08, 2013
When does a cow start to give milk?
A cow starts to give milk between the ages of two and two-and-a-half years, after the birth of its first calf. For the first few days the milk is unfit for human consumption and is fed to the calf which is afterwards reared separately. During the milking o...
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477. Where do you find frogs that live in trees
June 08, 2013
Where do you find frogs that live in trees?
Tree-frogs are found in Europe, North and South America, New Guinea, North Africa, and warm parts of Asia. They have small sticky discs on the tops of their fingers and toes which help them. Cling to the branches of trees.
The be...
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478. Why are bird's eggs so shaped
June 08, 2013
Why are bird’s eggs so shaped?
The roundness of an egg allows pressure to be applied from the outside which would break it if applied from the inside. Thus a helpless chick is protected until the moment it needs to break out from its shell. It can then do this with the gentlest of tapping. ...
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479. When does a caterpillar become a butterfly
June 08, 2013
When does a caterpillar become a butterfly?
A caterpillar starts to become a butterfly as soon as it enters the chrysalis stage, by wrapping itself in a cocoon. During this phase, known as pupation The insect gradually develops all the butterfly characteristics, including wings. For some but...
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480. Why do many birds have honeycombed bones
June 08, 2013
Why do many birds have honeycombed bones?
Birds fly so well because they have developed skeletons which are especially light and strong Most of their bones are hollow, with the interior webbed or honeycombed across by fine girders of bone to give added strength. They are sometimes called pne...
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Author: SM Bakhtiar
