Translocation of Minerals

Q.

In the pressure flow hypothesis osmotic pressure at sink must be?

Q.

Assertion : The process of loading at the source produces a hypotonic condition in the phloem.

Reason : That is the reason the phloem sap moves towards the sink.

1. if both A and R are true but R is not the correct explanation of A

2. if A is true but R is false

3. if both A and R are false.

4. if both A and R are true and R is the correct explanation of A

Q.

Discuss the factors responsible for ascent of xylem sap in plants.

Q.

The given diagram represents an experiment to demonstrate a certain phenomenon in a green plant.

1. Has the level of mercury in the glass tubing risen or fallen?
2. Name the life process of the plant which has caused the change in the level of mercury.
3. Define the process named above.
4. State any three advantages of this process to the plant.
5. Which conducting tissue of the plant does the glass tubing represents - Xylem or Phloem?

Q. What are the differences between facilitated diffusion and active transport??

Q. Translocation can be best described as

1. ascent of water
2. transport of substances through xylem and phloem over long distances
3. movement of food by phloem
4. loss of water through stomata

Q.

Explain pressure flow hypothesis of translocation of sugars in plants.

Q. All mineral are passively absorbed by the roots.

1. True
2. False

Q. The element that is not remobilized from one part of the plant to another is .

1. nitrogen
2. phosphorous
3. calcium
4. potassium

Q.

describe the cohesive force theory of ascent of sap in plants.

Q.

Which of the following elements is not remobilized from one part of the plant to another?

1. Phosphorous

2. Calcium

3. Nitrogen

4. Potassium