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प्रश्न
What is a streamlined body? How does it help in the movement of animals that fly or swim in water?
उत्तर
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A streamlined body is one which is pointed at the ends and broad in the middle. When such a body travels through a fluid or gaseous medium it exhibits minimum friction or resistance. A body shape which is streamlined helps cut against the friction created by the medium around the moving body.
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Streamlined body lowers the friction drag between a fluid, air, or water and an object moving trough that fluid. Drag is a force that slows down motion. Streamlining reduces the surface area of the moving object.
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Streamlining reduces the friction of movement to a minimum thus decreasing overall drag. Fishes can save energy while swimming because of the streamlined body.
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संबंधित प्रश्न
Very Short Answer Type Question:
How is a bird’s body adapted for flying?
Cockroaches have an outer skeleton.
The Atlas/Axis joint is an example of ______ joint.
Name the types of flight seen in birds.
Why do birds have hollow bones?
Match the name of the animals are given in Column I with the body parts used for movement given in Column II.
| Column I | Column II | ||
| (a) | Human being | (i) | Fines |
| (b) | Cow | (ii) | Wings |
| (c) | Snake | (iii) | Legs |
| (d) | Eagle | (iv) | Whole body |
| (e) | Fish | (v) | Limbs |
Given below is a list of different types of movements in animals.
[Running, Jumping, Walking, Slithering, Crawling, Flying, Swimming, Creeping]
Duck
Given below is a list of different types of movements in animals.
[Running, Jumping, Walking, Slithering, Crawling, Flying, Swimming, Creeping]
Horse
Given below is a list of different types of movements in animals.
[Running, Jumping, Walking, Slithering, Crawling, Flying, Swimming, Creeping]
Snail
Given below is a list of different types of movements in animals.
[Running, Jumping, Walking, Slithering, Crawling, Flying, Swimming, Creeping]
Human beings
