Excretory system of platyhlminthes consists of___________?
(A) Nephridia
(B) Flame cells
(C) Malpighian tubules
(D) Nephrons
All of the following coelenterates show alternation of generation except:
(A) Hydra
(B) Obelia
(C) Aurelia
(D) None of these
Enteron in coelenterates acts as___________?
(A) Digestive cavity
(B) Body cavity
(C) Transporting cavity
(D) all of these
Porifera range in size from__________?
(A) Few millimeter wide to more than one meter tall
(B) Few centimeter wide to more than one meter tall
(C) Few decimeter wide to more than one meter tall
(D) One meter wide to more than millimeter tall.
Coelom is lined by__________?
(A) Parietal mesoderm
(B) Visceral mesoderm
(C) Mesoderm
(D) Both A & B
The resolving power of electric microscope is____________?
(A) 0.2 mm
(B) 0.2 nm
(C) 0.2 m
(D) none of these
The organs of locomotion in annelids are__________?
(A) Muscles
(B) Hydrostatic skeleton
(C) Parapodia
(D) Setae
Which of following system is segmentally arranged in annelids?
(A) Excretory system
(B) Digestive system
(C) Criculatory system
(D) Nervous system
Which system is present in nematodes?
(A) Sac – like digestive system
(B) Tube – like digestive system
(C) Circulatory system
(D) Respiratory system