Maintaining turgor pressure in guard cells requires an uptake of

1. K+

2. H+

3. ATP

4. CO2

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


About _______________ % of the water taken in by roots is lost by transpiration.

1. 100

2. 98

3. 90

4. 60

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


Essential ions except _______________ are
removed from the roots and relocated through the xylem.

1. phosphorus

2. potassium

3. nitrogen

4. calcium

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


Guttation is:

1. movement of soluble organic materials through plants.

2. movement of water through the apoplast.

3. evidence of root pressure.

4. negative pressure created by transpiration.

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


Stomata close when the guard cells:

1. lose water.

2. photosynthesis begins and the internal CO2 concentration decreases.

3. gain chloride ions.

4. become turgid.

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


The pathway of water from the soil through the plant to the atmosphere is best represented by which of the following sequences?

1. endodermis- cortex - epidermis - vessel elements - intercellular spaces in mesophyll - stomata.

2. epidermis - cortex - Casparian strip - endodermis - sieve cells - intercellular spaces in the mesophyll - stomata.

3. Casparian strip - root hairs - epidermis - cortex - xylem - endodermis - intercellular spaces in mesophyll - stomata.

4. root hairs - cortex - endodermis - vessel elements - intercellular spaces in mesophyll - stomata.

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


Which is an incorrect statement.

1. Translocation of minerals up the xylem is an active process

2. The target cells unload the minerals by an active process

3. The absorption of minerals by plants is mostly an active process

4. Minerals usually flow up the vessels along with the transpiration stream.

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


Which of the following terms would be used to explain how trees can lift water to heights of ten stories or more?

1. transpiration

2. adhesion and cohesion

3. tensile strength

4. all of the above

Please attempt this question first.

Difficulty Level:


Which of the following will not cause the stomata to close?

1. wilting

2. increase in carbon dioxide concentration

3. darkness

4. increase in pH

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


If the guard cells and surrounding epidermal cells of a leaf were deficient in potassium ions, the rate of photosynthesis would

1. Increase

2. Decrease

3. Remain constant

4. Cannot be predicted

Please attempt this question first.

Difficulty Level: