Phloem

Q.

What are the functions of phloem ?

Q.

Study the diagram given below and then answer the questions that follow:

(a) Identify the tissue and give a reason to support your answer.
(b) Name the parts labelled 1, 2, 3, and 4.
(c) Where is this tissue likely to be found in the plant ?
(d) State the function of the parts labelled 1, 2, 3 and 4.

Q.

Name the four elements of phloem.

Q.

Why are xylem and phloem are called vascular or conducting tissues? [1 MARK]

Q. Flow in Xylem is unidirectional while in Phloem is bidirectional. Justify

Q.

Why are xylem and phloem known as complex permanent tissues?

Q.

What is meant by unidirectional transport and bidirectional transport of food?

Q.

Which of the following does not lose its nucleus at maturity?

1. Companion cells

2. Red blood cells

3. Vessel

4. Sieve tube cells

Q.

Explain all the elements of xylem and phloem.

Q. Which one of the following plant tissue helps in the transportation of food?

1. Phloem
2. Xylem
3. Parenchyma
4. Chlorenchyma

Q.

The product of Photosynthesis is transported from the source of production to the storage organs through

1. Palisade tissue

2. Phloem tissue

3. Spongy tissue

4. Xylem tissue

Q.

Food moves through xylem and water through phloem in plants. True or false?

1. True

2. False

Q.

_____________ is the food conducting tissue in plants.

Q.

Why are xylem and phloem bundled together?

Q.

Name the plant cell which is attached to the lateral side of sieve tube.

Q.

Sieve tubes and companion cells are components of

1. phloem

2. collenchyma

3. xylem

4. parenchyma

Q. Label the parts of phloem.

1. Sieve plate
2. Sieve tube
3. Companion cell

Q.

Explain different types of elements present in phloem.

Q. Which of the following statements for vascular tissues are true?

1. Phloem is a conducting tissue.
2. Companion cells are present in xylem.
3. Phloem transport food.
4. Xylem fibres provide mechanical strength.

Q.

Which of the following statements are correct?

(i) Companion cells are present in phloem.
(ii) Xylem transports water and minerals from roots to other parts of the plant.
(iii) Vessels of xylem are present in all plants.
(iv) Both xylem parenchyma and phloem parenchyma have nucleus.

1. (i), (ii) and (iv)
2. (i) and (ii)
3. (i), (ii) and (iii)
4. (i) and (iii)

Q.

The conducting cells of xylem are?

1. Companion cells

2. Tracheary elements

3. Sieve elements

4. All of these

Q. The flexibility in plants is generally due to the presence of a permanent tissue called __.

1. parenchyma
2. sclerenchyma
3. aerenchyma
4. collenchyma

Q.

Is xylem (or phloem) homogeneous tissue or heterogeneous tissue?

Q.

Explain how sieve tubes manage to be living ?

Q.

Phloem conducts food throughout the plant

1. True
2. False

Q. Are seive tube dead at maturity

Q.

Which one of the following is a dead cell?

1. Phloem fibres

2. Sieve tube

3. Aerenchyma

4. Companion cell

Q.

Name the different elements of xylem and phloem

Q.

Name the death component of the phloem tissue?

Q.

Name the tissue through which glucose is transported from the leaves to different parts of the plant.