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Question (21)

QN007809

Which structure mainly helps in transpiration?

(A) Xylem fibres
(B) Root cap
(C) Stomata
(D) Annual rings

Correct Answer: C

Explanation:

Water vapour escapes through stomata.

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Question (22)

QN007810

A plant lacking stomata would face difficulty mainly in:

(A) Cell division
(B) Gaseous exchange and transpiration
(C) Seed formation
(D) Root branching

Correct Answer: B

Explanation:

Stomata help in gas exchange and transpiration.

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Question (23)

QN007811

Which simple permanent tissue mainly stores food?

(A) Sclerenchyma
(B) Collenchyma
(C) Parenchyma
(D) Phloem

Correct Answer: C

Explanation:

Parenchyma stores food materials.

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Question (24)

QN007812

Aquatic plants float because their parenchyma contains:

(A) Lignin
(B) Air spaces
(C) Calcium salts
(D) Chlorophyll only

Correct Answer: B

Explanation:

Air spaces provide buoyancy.

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Question (25)

QN007813

Flexibility in young stems is mainly due to:

(A) Sclerenchyma
(B) Xylem
(C) Collenchyma
(D) Cork

Correct Answer: C

Explanation:

Collenchyma provides flexibility.

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Question (26)

QN007814

Why does a fresh twig bend while a dry twig breaks?

(A) Fresh twig lacks epidermis
(B) Dry twig lacks xylem
(C) Fresh twig has flexible collenchyma
(D) Dry twig contains chlorophyll

Correct Answer: C

Explanation:

Collenchyma provides flexibility to fresh twigs.

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Question (27)

QN007815

Coconut husk fibres are hard because they contain abundant:

(A) Pectin
(B) Cutin
(C) Lignin
(D) Starch

Correct Answer: C

Explanation:

Lignin makes sclerenchyma hard.

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Question (28)

QN007816

Which tissue forms the hard covering of nuts and seeds?

(A) Parenchyma
(B) Collenchyma
(C) Sclerenchyma
(D) Epidermis

Correct Answer: C

Explanation:

Sclerenchyma provides hardness and strength.

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Question (29)

QN007817

Which tissue transports water and minerals in plants?

(A) Phloem
(B) Epidermis
(C) Xylem
(D) Cork

Correct Answer: C

Explanation:

Xylem conducts water and minerals.

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Question (30)

QN007818

Which component is the only living part of xylem?

(A) Vessel
(B) Tracheid
(C) Xylem fibre
(D) Xylem parenchyma

Correct Answer: D

Explanation:

Xylem parenchyma remains living.

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Question (21)

Which structure mainly helps in transpiration?

Explanation:

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Question (22)

A plant lacking stomata would face difficulty mainly in:

Explanation:

Link:

Question (23)

Which simple permanent tissue mainly stores food?

Explanation:

Link:

Question (24)

Aquatic plants float because their parenchyma contains:

Explanation:

Link:

Question (25)

Flexibility in young stems is mainly due to:

Explanation:

Link:

Question (26)

Why does a fresh twig bend while a dry twig breaks?

Explanation:

Link:

Question (27)

Coconut husk fibres are hard because they contain abundant:

Explanation:

Link:

Question (28)

Which tissue forms the hard covering of nuts and seeds?

Explanation:

Link:

Question (29)

Which tissue transports water and minerals in plants?

Explanation:

Link:

Question (30)

Which component is the only living part of xylem?

Explanation:

Link:

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