Phloem

Q.

The girdling experiment is performed to demonstrate:

1. Aspiration

2. Condensation

3. Transpiration

4. Friction

Q.

Name the components of phloem. Which of them are living? What is the function performed by phloem tissue? [3 MARKS]

Q.

Which of the following is a dead cell?

1. Companion cell

2. Phloem parenchyma

3. Phloem cell

4. Sieve tube

Q.

Define capillary action and give some examples of it.

Q.

Xylem can conduct substances only in one direction, whereas, phloem can transport substances in both directions.

Connective tissue

Protective tissue

Q.

Which xylem element stores food like starch or fats and other substances like tannin?

Q.

The transportation in xylem in usually unidirectional, whereas in phloem it is __.

Q.

Name the different types of cells that make up phloem.

Q.

What is active transport in the roots of plants?

Q. form the main conducting part of the phloem.

1. Phloem parenchyma
2. Phloem fibres
3. Companion cells
4. Sieve tubes

Q. What do we mean by source and sink of the plant?

Q.

Axial movement of water and nutrients in plants by xylem and phloem is called

1. Compression

2. Conduction

3. Transpiration

4. Photosynthesis

Q.

Food is ___ transported through the phloem to all parts of the plant.

1. bi-directionally

2. horizontally

3. downwardly

4. uni-directionally

Q.

Flow in xylem is bi-directional.

1. Organic compounds synthesized in the leaves are transported to storage organs only.

2. Organic and mineral nutrients undergo multi-directional transport.

Q.

What happens to unused carbohydrates produced in the plant body?

1. Eliminated through excretion.

2. More energy is produced to enhance growth.

3. Stored in the form of starch for future use.

4. Transported to stems in the form of glycogen.

Q. How are roots useful to plants? Give any two points.

Q.

Which plant tissue is shown in the above picture?

1. Xylem

2. Pholem

3. Meristematic tissue
4. Epidermis

Q.

Define the term ascent of sap

Q. In plants, food is transported through the

1. Companion cell
2. Sieve tubes
3. Tracheids
4. Vessels

Q. The vascular tissue that helps in transporting water up the plant. What do we call it?

1. Phloem
2. Tracheids
3. Capillary tubes
4. Xylem

Q. Compare set I with set II and mark the incorrect pairs.

Set I	Set II
i. Xylem	bidirectional
ii. Phloem	unidirectional
iii. Turgidity	outward direction
iv. Wall pressure	inward direction

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

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.

If the food from a plant does not reach reach roots, which tissue do you think is damaged?

Q.

Phloem parenchyma mainly functions in __________.

Q. Label the parts of phloem.

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

Q.

Chloroplast containing cells in leaves are called __ .

Q. Assertion :Death of companion cell leads to the death of sieve cells also. Reason: Both companion and sieve are phloem cells.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q.

Which plant tissue is given in the above picture?

1. Phloem
2. Xylem
3. Meristem
4. Epidermis

Q.

Identify the correct set of statements related to the movement of substances through vascular tissues.

I. Xylem mainly translocates water, minerals salts and also inorganic solutes.

II. Phloem mainly translocates a variety of organic solutes and also inorganic solutes.

III. Xylem transports substances from roots to aerial parts of the plants.

IV. Phloem transports substances bidirectionally.

1. I & III only

2. II & IV only

3. I & II only

4. I, II, III & IV

Q.

Identify A, B, C and D respectively.

1. Permanent tissue, Collenchyma, Lateral meristem and Phloem
2. Epithelial tissue, Lateral meristem, Collenchyma and Phloem
3. Permanent tissue, Lateral meristem, Collenchyma and Phloem
4. Epithelial tissue, Collenchyma, Lateral meristem and Sieve tube