Biology Mcqs

Hydra has no specialized excretory system because:

A. It does not produce waste material
B. Due to absence of mesoderm
C. The whole body cells are in contact with water
D. It has pseudocoelom.

In animals excess of nitrogen is excreted primarily in form of___________?

A. Creatinine
B. Trimethyamine oxide
C. Pyrimidine
D. Ammonia

In plants, which of the following is a waste product produced both during photosynthesis and respiration?

A. CO2
B. H2O
C. O2
D. Both A and B

Which of the following treatment will be administered first in a newly diagnosed renal failure patient?

A. Renal transplant
B. Peritoneal Dialysis
C. Lithotripsy
D. Hemodialysis

Which of the following kidney stones are most common?

A. Calcium oxalate
B. Calcium phosphate
C. Uric acid
D. All of these

Which of the following nephrons play important role in production of concentrated urine?

A. Crotical
B. Medullary
C. Juxtramedullary
D. None of these

Which of the following excretory structure is associated with gut of the organism?

A. Protonephridium
B. Metanephridium
C. Malpighian tubules
D. Nephrons

The main nitrogenous waste formed in the body of earthworm is/are___________?

A. Ammonia
B. Urea
C. Uric acid
D. Trimethylamine oxide

Each ach nephridium of earthworm opens to the exterior by__________?

A. Nephrostome
B. Nephridiopore
C. Flame cell
D. Anus

Amount of water required to excrete 1gN of Urea is_________?

A. 1 ml
B. 50 ml
C. 100 ml
D. 150 ml