Question No : 1
When any plane passing through the central axis of the body divides the organism into two identical halves, the organism is called ___________.
Question No : 2
Animals like annelids, arthropods, etc. where the body can be divided into identical left and right halves in only one plane, exhibit___________symmetry.
Question No : 3
Which of the following is a fresh water sponge?
Question No : 4
Few cnidarians like corals have a skeleton composed of
Question No : 5
Meandrina (brain coral) belongs to phylum
Question No : 6
In ctenophora, the body bears _______ external rows of ciliated comb plates, which help in locomotion.
Question No : 7
Flame cells present in platyhelminthes, are specialized in