Transport System in Plants

Q.

Why transpiration does not take place at night?

Q. Which of the following statement(s) is/are correct?

Statement 1: Movement of water in xylem is unidirectional.
Statement 2: Xylem is a vascular tissue.

1. Statement 1: True; Statement 2: False
2. Statement 1: True; Statement 2: True
3. Statement 1: False; Statement 2: True
4. Statement 1: False; Statement 2: False

Q. Unidirectional movement of substances occurs through

1. xylem
2. phloem
3. xylem and phloem
4. None of these

Q. Choose the correct option(s) with respect to the transportation in plants.

1. Xylem transports water and minerals.
2. Flow in xylem is unidirectional.
3. Flow in phloem is unidirectional.
4. Flow in phloem is bidirectional.

Q.

Name the following :
Evaporation of water from the aerial parts of the plant.

Q.

Transpiration is important for plants because:

I: It removes extra water

II: It cools down the plant

III: It helps in transport of food

IV: It helps in transport of water upwards

1. II, III, and IV

2. I, II, and III

3. I, II, and IV

4. II and III

Q. Xylem conducts only food and phloem conducts only water in plants.

1. False

2. True

Q. Match the following.
$\begin{array}{cc}\text{Column A}& \text{Column B}\\ \left(a\right)\text{Transportation of water}& \left(i\right)\text{Stomata}\\ \left(b\right)\text{Exchange of gases}& \left(ii\right)\text{Xylem}\\ \left(c\right)\text{Transportation of food}& \left(iii\right)\text{Phloem}\end{array}$

1. a - ii, b - i, c - iii
2. a - iii, b - ii, c - i
3. a - ii, b - iii, c - i
4. a - i, b - iii, c - ii

Q.

Transpiration is necessary because:

1. It helps plants to survive on hot sunny days

2. Only B

3. It creates a suction force for transport of water

4. Both A and B

Q. is the plant tissue associated with translocation.

1. Leaves
2. Phloem
3. Stem
4. Xylem

Q.

____ transports food from leaves to other parts of the plant.

1. Vessels

2. Xylem

3. Phloem

4. Stomata

Q. Xylem is unidirectional, whereas, phloem is bidirectional.

1. True
2. False

Q. Which vessel is responsible for the transport of water in plants?

1. Stomata
2. Chloroplast
3. Phloem
4. Xylem

Q. transports water and minerals in plants.

1. Xylem
2. Root
3. Phloem
4. Leaves