- (A) Nephridia
- (B) Flame cells
- (C) Malpighian tubules
- (D) Nephrons
Biology Mcqs
- (A) Hydra
- (B) Obelia
- (C) Aurelia
- (D) None of these
- (A) Digestive cavity
- (B) Body cavity
- (C) Transporting cavity
- (D) all of these
- (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.
- (A) Parietal mesoderm
- (B) Visceral mesoderm
- (C) Mesoderm
- (D) Both A & B
- (A) 0.2 mm
- (B) 0.2 nm
- (C) 0.2 m
- (D) none of these
- (A) 48
- (B) 44
- (C) 46
- (D) 26
- (A) Muscles
- (B) Hydrostatic skeleton
- (C) Parapodia
- (D) Setae
- (A) Excretory system
- (B) Digestive system
- (C) Criculatory system
- (D) Nervous system
- (A) Sac – like digestive system
- (B) Tube – like digestive system
- (C) Circulatory system
- (D) Respiratory system
