Among the following which one is an example of acoelomate

During the time of delivery, the mother experience severe labour pain, Name the hormone responsible for it?

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

Sponges are example of ______ phylum.

Earth worm is an example of

Among the following which one is a poikilothermic animal.

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

Animals are classified into vertebrates and invertebrates based on the presence and absence of

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

Male and female sex organs present in the same animal is called as