Open wells are not very ………….. .

…………… wells are very deep.

The number of dry open wells are charged by Sri Ram Sagar Project was

In towns and cities, generally , the bore wells have to be dug very deep to get water as compared to bore wells dug in villages. Give suitable reasons.

Contraceptive pills are very effective with lesser side-effects and are well accepted by the females. They work by

Contraceptive pills are very effective with lesser side-effects and are well accepted by the females. They work by

Contraceptive pills are very effective with lesser side-effects and are well accepted by the females. They work by

_____water is obtained through open wells, tube wells or hand pumps, springs,

Why pollen grains are very well preserved as fossils?