Biology Mcqs

Which of the following mechanism explains development of anemia in Renal failure?

A. Failure of bone marrow is accompanied with renal failure.
B. Destruction of RBC results from accumulated urea in the blood.
C. Chronicity of the disease is respobsible for anemia
D. Failure of proper RBC synthesis, due to lack of chemical stimulation.

Which of the following constituent is/are maximum in the filtrate that leaves proximal convoluted tubules?

A. Glucose
B. Amino acids
C. Nitrogenous waste
D. All of these

Protonephridia are present in____________?

A. Round worms
B. Flateworm
C. Tape worms
D. Segmented worms

Aquatic animals excrete nitrogenous waste commonly in the form of_____________?

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

Terrestrial animals like kangaroo rat survive even without drinking water since__________?

A. They don’t require water for their metabolic process
B. They can retain excessive water in their body during raining season.
C. They feed on carbohydrate rich seeds which can provide them with metabolic water
D. They are anhydrobiotic organisms

Marine fish can keep their internal environment hypertonic with respect to the surrounding salty water by retaining.

A. Excessive urea which will increase their internal solute concentration and prevent body shrinkage in hypertonic environment
B. Trimethyl alanine
C. Ammonia
D. Trimethylamine oxide

In a hot summer after noon, if your body’s Homeostatic machinery keep your internal temperature quite lower than that of external than this is an example of____________?

A. Positive feed back
B. Negative feed back
C. Feed back
D. Osmoregulation

Rose is an example of____________?

A. Hydrophytes
B. Mesophytes
C. Xerophytes
D. Halophytes

Which of the following fishes excrete large volume of diluted urine?

A. Bony Marine fishes
B. Fresh water fishes
C. Both depending upon the surrounding water
D. None of these

The characteristic which enable animals to tolerate dehydration is called__________?

A. Osmoconformation
B. Osmoregulaton
C. Anhydrobiosis
D. Anhydrosis