Which is the largest phylum?

Cockroach belongs to which phylum.

__________ is called as the good indicators of environmental changes.

Which is the highly poisonous fish in the world?

Which is the largest poisonous snake?

What is the action of the drug that derived form the extract of poison arrow frog?

Round worm is an example of

Fishes live in fresh water and breed in the ocean, this migration is called as

Among the following which one is a poikilothermic animal.

Who was the person who first observed and draw sperm cells?