Each human kidney receives _______% of total cardiac out put?

A. 10%
B. 20%
C. 30%
D. 40%

On which of the following site the posterior pituitary hormone acts predominantly?

A. Proximal convoluted tubule
B. Descending limb of loop of henle
C. Ascending limb of loop of henle
D. Collecting tubules

Animals that produce metabolic heat at low level and also absorb heat from the surroundings are called__________?

A. Endotherms
B. Ectotherms
C. Heterotherms
D. Homeotherms

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.

The distal blind end of the malpighian tubules bathes freely in____________?

A. Digestive tract
B. Intestines
C. Haemocoel
D. Coelom

Which of the following is a sentimentally arranged excretory system?

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

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 treatment will be administered first in a newly diagnosed renal failure patient?

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

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

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

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