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Question (41)

QN007879

A plant with damaged root tips is likely to show reduced:

(A) Stem girth
(B) Leaf colour
(C) Root elongation
(D) Bark formation

Correct Answer: C

Explanation:

Root elongation depends on apical meristem.

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Question (42)

QN007880

Why are annual rings sometimes narrow and sometimes wide?

(A) Due to stomatal opening
(B) Due to different climatic conditions
(C) Due to chlorophyll content
(D) Due to root hair growth

Correct Answer: B

Explanation:

Climate affects yearly growth rate.

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Question (43)

QN007881

Which tissue helps in both growth and regeneration in plants?

(A) Permanent tissue
(B) Meristematic tissue
(C) Epidermal tissue
(D) Conducting tissue

Correct Answer: B

Explanation:

Meristematic tissue enables growth and repair.

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Question (44)

QN007882

The actively dividing ring of cells in stems responsible for girth increase is called:

(A) Epidermis
(B) Lateral meristem
(C) Root cap
(D) Cortex

Correct Answer: B

Explanation:

Lateral meristem forms secondary tissues.

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Question (45)

QN007883

Which of the following best explains why plants continue to grow throughout life?

(A) Presence of chloroplasts
(B) Presence of meristematic tissues
(C) Presence of bark
(D) Presence of stomata

Correct Answer: B

Explanation:

Meristematic tissues remain active throughout life.

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Question (46)

QN007884

In onion root observations, growth measurements are generally taken from:

(A) Root cap to leaf tip
(B) Base of bulb to root tip
(C) Stem node to internode
(D) Root hair to cortex

Correct Answer: B

Explanation:

Root length is measured from bulb base to root tip.

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Question (47)

QN007885

Which plant tissue is directly associated with continuous mitotic activity?

(A) Sclerenchyma
(B) Parenchyma
(C) Meristematic tissue
(D) Epidermis

Correct Answer: C

Explanation:

Meristematic tissue undergoes continuous mitosis.

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Question (48)

QN007886

Which statement about intercalary meristem is correct?

(A) It is present only in roots
(B) It helps regeneration after cutting
(C) It forms annual rings
(D) It produces bark

Correct Answer: B

Explanation:

Intercalary meristem supports regrowth.

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Question (49)

QN007887

Which feature of meristematic cells supports rapid metabolism?

(A) Dense cytoplasm with many organelles
(B) Thick dead walls
(C) Large air cavities
(D) Large vacuoles

Correct Answer: A

Explanation:

Dense cytoplasm supports active metabolism.

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Question (50)

QN007888

Which plant part mainly demonstrates the activity of lateral meristem over many years?

(A) Young leaf
(B) Root hair
(C) Tree trunk
(D) Flower petal

Correct Answer: C

Explanation:

Tree trunks increase girth due to lateral meristem.

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Question (41)

A plant with damaged root tips is likely to show reduced:

Explanation:

Link:

Question (42)

Why are annual rings sometimes narrow and sometimes wide?

Explanation:

Link:

Question (43)

Which tissue helps in both growth and regeneration in plants?

Explanation:

Link:

Question (44)

The actively dividing ring of cells in stems responsible for girth increase is called:

Explanation:

Link:

Question (45)

Which of the following best explains why plants continue to grow throughout life?

Explanation:

Link:

Question (46)

In onion root observations, growth measurements are generally taken from:

Explanation:

Link:

Question (47)

Which plant tissue is directly associated with continuous mitotic activity?

Explanation:

Link:

Question (48)

Which statement about intercalary meristem is correct?

Explanation:

Link:

Question (49)

Which feature of meristematic cells supports rapid metabolism?

Explanation:

Link:

Question (50)

Which plant part mainly demonstrates the activity of lateral meristem over many years?

Explanation:

Link:

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