NCERT Solutions for Chapter: Transport in Plants, Exercise 2: VERY SHORT ANSWER TYPE QUESTIONS

Smaller, lipid soluble molecules diffuse faster through cell membrane, but the movement of hydrophilic substances are facilitated by certain transporters which are chemically transport _____ (proteins/carbohydrates).

In passive transport across a membrane, when two different molecules move in the opposite directions and independent of each other, it is called _____.

Osmosis is a special kind of diffusion, in which water diffuses across the cell membrane. The rate and direction of osmosis depend upon both pressure gradient and _____ (concentration gradient/ osmotic potential).

A flowering plant is planted in an earthen pot and irrigated. Urea is added to make the plant grow faster, but after some time the plant dies. This may be due to an osmotic process called___.

Absorption of water from soil by dry seeds increases the_____, (diffusion pressure/ imbibition pressure) thus helping seedlings to come out of soil.

Water moves up against gravity and even for a tree of 20m height, the tip receives water within two hours. The most important physiological phenomenon which is responsible for the upward movement of water is___.

The plant cell cytoplasm is surrounded by both cell wall and cell membrane. The specific transport of substances mostly occurs across the cell membrane. Is it fully permeable or selectively permeable?

The C4 plants are twice as efficient as C3 plants in terms of fixing CO₂ but lose only _____ (half/full) as much water as C3 plants for the same amount of CO₂ fixed.