what is wbc and its types

What is a rainbow ? What is its two types ? How are they formed ? Discuss briefly.

What is placentation ? Name its types and describe any one with typical diagram

Pathogen and its Types

What is simple tissue ? Classify and explain its different types with suitable diagram.

Discuss the concept of hybridisation. What are its different types in a carbon atom ?

What is reflex action? Write its types and two examples.

What are p-type and n-type semiconductors?

What are n-type and p-type semiconductors?

Observe the movement of the pendulum in the given figure. If its PE at A is 90J, how much and what type of energy will it at O and B.

What is immunity and different types of it ?