Reproduction in animals — Science STD 8 — Question

What is the other name of sex cell?

What substance present in our body balances the atmospheric pressure acting on us?

Name the non-metal used to make purple coloured solution which is applied on cuts and wounds as an antiseptic.

Vinegar is a sour liquid. State whether vinegar will conduct electricity or not.

What term is used for the following?
The change from tadpole to frog.

Name one disease which spreads through infected food or water.

State whether the following statements are True or False:
Binary fission is a method of asexual reproduction.

State whether the following statements are True or False:
Internal fertilization takes place in hens.

Which agricultural practice comes first: harvesting or weeding?

A highly poisonous animal Z which inhabits crop field is commonly known as friend of the farmer. It eats up pests like Y and saves the crops from damage.
The animal X is killed in large numbers to get its Z which sells in the market at a high price. What is X, y and Z?