FREE NEET Biology Practice MCQ Test: Transport In Plants Exercise 4 Questions Answers With Detailed Explanations [PDF]

Answer: (a)

Answer: (c)

The casparian strips are formed due to deposition of wax like substance called suberin.

Answer: (b)

Answer: (b)

Answer: (a)

Water logging of soil makes it physiologically dry because this condition does not allow oxygen to enter the soil.

Answer: (a)

Answer: (c)

Answer: (b)

The hydrostatic pressure developed inside the cell wall due to endosmosis is called turgor pressure. Due to turgor pressure, the rigid cell wall offers resistance. This resistance which works in a direction opposite to turgor pressure is the wall pressure.

Answer: (a)

Answer: (d)

Answer: (d)

Answer: (d)

Answer: (d)

If we cut a small soft-stemmed plant on a day, when there is plenty of atmospheric moisture, early in the morning we will soon see drops of solution ooze out of the cut stem; this comes out due to the positive root pressure. If we fix a rubber tube to the cut stem as a sleeve we can actually collect and measure the rate of exudation, and also determine the composition of the exudates. Root pressure is a positive pressure that develops in the xylem sap of the root of some plants. It is a manifestation of active water absorption. Root pressure is observed in certain seasons which favours optimum metabolic activity and reduce transpiration. It is more during rainy season in the tropical countries and during spring in temperate habitats.

Answer: (b)

Answer: (d)

Transpiration occurs in plants, only from living cells. Evaporation occurs from any free surface. i.e., both from living and non-living surfaces.

Answer: (b)

Answer: (d)

Answer: (a)

Answer: (b)

If a stem is girdled, root dies first as the food synthesized by leaves is not able to reach to the roots.

Answer: (c)