Respiration in Organisms — Science STD 7 — Question

A man digging the ground near a water body found that the soil was moist. As he kept digging deeper and deeper he reached a level, where all the spaces between particles of soil and gaps between rocks where filled with water. The upper limit of this layer is called:

Which of the following are not the liquid forms of water?

In which of the following cases does the change involve both physical and chemical changes?

Who gave an accurate expression for time based on shadow length?

Cud is the name given to the food of ruminants which is:

is the primary source of energy:

The blood vessels which carry carbon dioxide rich blood from all parts of the body back to the heart are called.

The wire which melts and breaks the circuit when large current is allowed to flow through it is called.

To which disease is smoking linked?

A person placed his fingers of the right hand on the inner side of his left wrist. He felt some throbbing movements. This throbbing movement is known as _________________ and it occurs _________________