_______ are the first group of invertebrates which have developed a closed circulatory system.

Related Mcqs:

Kingdom Protoctista includes____________?

A. Fungi B. Prokaryotes E. protists D. Piantae...

Haemodialysis means cleaning of____________?

A. Urine B. Blood C. Glomerular filterate D. Coelomic fluid...

Removal or degradation of environmental pollutants or toxic materials by living organisms is called__________?

A. Integrated disease management B. Hydroponic culture technique C. Pasteurization D. Bioremediation...

Intake of liquid material by cell membrane is called___________?

A. Endocytosis B. Exocytosis C. Phagocytosis D. Pinocytosis...

In chrosomes, the material controlling heredity is ________ ?

A. DNA B. Histones C. Chromocentres D. RNA...