The system well developed in the acoelomate is___________?

A. Excretory system
B. Nervous system
C. Transport system
D. All of these

In acoelomates gut is ________ in origin.

A. Ectodermal
B. Endodermal
C. Mesodermal
D. None of these

Venus flower basket is also known as___________?

A. Sycon
B. Euplectella
C. Leucoselenia
D. Spongilla

The internal buds are known as__________?

A. Spicules
B. Choanocytes
C. Gemmules
D. None of these

Aschelminthes is also known as____________?

A. Protozoans
B. Eumatazoa
C. Nematodes
D. Protoctist ancestors

The name animal is derived from the word__________?

A. Anima
B. Anemia
C. Aname
D. All of these

All the animals of the grade radiata are____________?

A. Diploblastic
B. Triploblastic
C. Both
D. Unicellular

The fate of each blastomere is foretold. The cleavage will be as____________?

A. Spiral and indeterminate
B. Radial and indeterminate
C. Radial and indeterminate
D. Spiral and determinate

Aquatic arthropods respire through__________?

A. Spiracles
B. Gills
C. Book lungs
D. Both b and c

Circulatory system is open type in all of the following except:___________?

A. Arthropoda
B. Gastropoda
C. Pelecypoda
D. Cephalopoda