Single circulation (Simple Circuit Heart) is found in ……………

The protozoa like sponges use……… for transportation.

Sponges create their own water currents by beating of :

Which of the following is a serious inherited blood disorder?

Gastro – vascular cavity is evolved in:

Branched digestive system is found in:

The first Eucoelomate animals that have developed a pulsatile vessel are :

The group of animals that exhibit open type of circulatory system is :

Animal without red blood cells is …………

These organisms utilize their water vascular system for their movement.