Biology MCQs

✅ The correct answer is option C.
The suitable conditions in which the rate of evaporation occurs more fastly are low humidity and high temperature.

✅ The correct answer is option A.
The uptake of water can be measured using a potometer. Under normal circumstances, the rate of water uptake gives a measure of the rate of transpiration . A simple potometer is a piece of capillary tubing to which a plant has been connected. Ganong’s potometer is the right answer.

✅ The correct answer is option C.
In plants, photosynthesis takes place in chloroplasts, which contain the chlorophyll. Chloroplasts are surrounded by a double membrane and contain a third inner membrane, called the thylakoid membrane, that forms long folds within the organelle.

✅ The correct answer is option C.
Biological Oxygen Demand is full form of BOD.

✅ The correct answer is option C.
Food wrapped in newspaper is likely to get contaminated with lead.

✅ The correct answer is option C.
The ultimate cause of water movement in a plant stem against gravity is transpiration.

✅ The correct answer is option C.
The non-biotic pollutant of underground water is arsenic.

✅ The correct answer is option B.
Waxes protect plants from water loss and abrasive damage.

✅ The correct answer is option D.
The principal function of the loop of Henle is in the recovery of water and sodium chloride from urine.

✅ The correct answer is option C.
A potometer, sometimes known as transpirometer, is a device used for measuring the rate of water uptake of a leafy shoot which is almost equal to the water lost through transpiration.