Plant Physiology-Transport in Plants (NEET Biology): Questions 27 - 31 of 76

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Question number: 27

» Plant Physiology » Transport in Plants » Transpiration-Opening and Closing of Stomata

MCQ▾

Question

The condition under which transpiration would be most rapid is

Choices

Choice (4) Response

a.

High humidity.

b.

Low humidity, high temperature, guard cells are turgid (open) and moist soil

c.

Low velocity of wind.

d.

Excess of water in soil.

Question number: 28

» Plant Physiology » Transport in Plants » Transpiration-Opening and Closing of Stomata

MCQ▾

Question

Which one of the following describes a possible reason for the opening and closing of the guard cells?

Choices

Choice (4) Response

a.

Stomata open in daylight because starch is changed to osmotically active substances which increase the turgidity of the guard cells.

b.

Stomata close in darkness because the starch produced in daylight by photosynthesis; it is changed in to sugars and translocated from the guard cells.

c.

Stomata open in daylight because guard cells have chloroplast osmotic pressure arises.

d.

Stomata open in daylight because photosynthesis occurs in the guard cells producing sugar resulting in higher osmotic pressure.

Question number: 29

» Plant Physiology » Transport in Plants » Water Potential

MCQ▾

Question

Most water absorption in plants takes place through

Choices

Choice (4) Response

a.

Root cap

b.

Root apex

c.

Root hair zone

d.

Meristematic zone

Question number: 30

» Plant Physiology » Transport in Plants » Absorption

MCQ▾

Question

Absorption of water by root is increased by

Choices

Choice (4) Response

a.

Increase in transpiration.

b.

Decrease in transpiration.

c.

Increase in the rate of photosynthesis.

d.

Decrease in salt uptake.

Question number: 31

» Plant Physiology » Transport in Plants » Transpiration Pull

MCQ▾

Question

Many transplanted seedling may not survive because

Choices

Choice (4) Response

a.

Most of the root hairs are lost during transpiration.

b.

They do not like the new soil.

c.

They do not get required mineral salts.

d.

The leaves get damaged.

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