What a dog do to keep its body cool?

[A] : All invertebrates can keep their body temperature constant all the time . [R] : Amoeba can also keep its body temperature constant as it has well-defined blood vascular system .

What do you mean by Ciliary body of eye.

(a) What the names of different types of WBC present in blood. (b) State how do they do they help in body defence.

What do you mean by ozone hole? What are its consequences?.

What should we do to prevent microbes from causing infections in our bodies?

How do the weight and height of the body increase?

How do salt water fishes maintain the water and salt level in their body?

The momentum of a body is numerically equal to the kinetic energy of the body. What is the velocity of the body ?