The application for physics have played a key role in the development of technology.The idea of calculus was given by………………………

Oxygen play a key role in the troposphere while ozone in the stratosphere.

In what way have microbes played a major role in controlling disease caused by harmful bacteria ?

Read the following statements carefully and select the appropriate option given below. (i) Bisexual animals that possess both male and female reproductive organs, are hermaphrodites. (ii) In seed plants, pollen grains are the carriers of male gametes and ovule have the egg. (iii) Events in sexual reproduction before the formation of zygote are called post-fertilisation events. (iv) Sexual reproduction involves the formation and fusion of gametes, (v) Animals are categorised into oviparous and viviparous based on whether the development of the zygote takes place outside the body of the female parent or inside.