Reproduction in animals — Science STD 8 — Question

Name a hormone (other than adrenalin) secreted by adrenals.

Write the full form of PCRA.

Where and when was the world’s first oil well drilled?

What are the male gametes in humans called?

Which agricultural practice is carried out with the help of a sickle?

State whether the following statements are True or False:
Each sperm is a single cell.

Define the calorific value of a fuel.

Which force is responsible for the wearing out of car tyres?

Name the unit in which the calorific value of a fuel is expressed.

One student says that water exerts pressure on the bottom of the bucket but another student says that water exerts pressure on the sides of the bucket. What would you like to say?