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Question (21)

QN005502

The tendency of shoots to grow toward light demonstrates that plants:

(A) Cannot respond to surroundings
(B) Respond to environmental stimuli
(C) Depend only on soil
(D) Do not grow after germination

Correct Answer: B

Explanation:

Shoots show phototropism, a response to light stimulus.

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Question (22)

QN005503

A plant was 12 cm tall. After 3 weeks it became 24 cm tall. By how many centimetres did it grow?

(A) 10 cm
(B) 11 cm
(C) 12 cm
(D) 36 cm

Correct Answer: C

Explanation:

Growth = 24 − 12 = 12 cm.

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Question (23)

QN005504

Which part of a young plant usually emerges above the soil surface?

(A) Root
(B) Shoot
(C) Seed coat
(D) Embryo only

Correct Answer: B

Explanation:

The shoot grows upward above the soil.

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Question (24)

QN005505

If a seedling grows 3 cm in Week 1 and 4 cm in Week 2, the total growth is:

(A) 5 cm
(B) 6 cm
(C) 7 cm
(D) 8 cm

Correct Answer: C

Explanation:

Total growth = 3 + 4 = 7 cm.

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Question (25)

QN005506

A student places a plant inside a box with a small opening for light. The shoot is expected to grow:

(A) Toward the opening
(B) Away from the opening
(C) Downward
(D) Without changing direction

Correct Answer: A

Explanation:

Shoots grow toward light (phototropism).

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Question (26)

QN005507

Which activity best demonstrates growth rather than movement?

(A) Folding of leaves of touch-me-not
(B) Increase in stem length over time
(C) Opening of flowers
(D) Turning of leaves toward light in a day

Correct Answer: B

Explanation:

Growth involves permanent increase in size.

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Question (27)

QN005508

A root grows 2 cm every 5 days. How much will it grow in 15 days?

(A) 4 cm
(B) 5 cm
(C) 6 cm
(D) 8 cm

Correct Answer: C

Explanation:

15 days = 3 × 5 days, so growth = 2 × 3 = 6 cm.

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Question (28)

QN005509

The growth of roots downward helps a plant mainly to:

(A) Catch insects
(B) Absorb water and minerals from soil
(C) Produce flowers
(D) Make fruits quickly

Correct Answer: B

Explanation:

Roots absorb water and minerals from soil.

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Question (29)

QN005510

A shoot measures 7 cm initially and 19 cm after some days. What is the growth?

(A) 10 cm
(B) 11 cm
(C) 12 cm
(D) 26 cm

Correct Answer: C

Explanation:

Growth = 19 − 7 = 12 cm.

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Question (30)

QN005511

Which observation provides evidence that plant growth is directional?

(A) Roots grow downward while shoots grow upward.
(B) Leaves are green.
(C) Flowers are colourful.
(D) Fruits contain seeds.

Correct Answer: A

Explanation:

Roots and shoots show directional growth.

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Question (21)

The tendency of shoots to grow toward light demonstrates that plants:

Explanation:

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Question (22)

A plant was 12 cm tall. After 3 weeks it became 24 cm tall. By how many centimetres did it grow?

Explanation:

Link:

Question (23)

Which part of a young plant usually emerges above the soil surface?

Explanation:

Link:

Question (24)

If a seedling grows 3 cm in Week 1 and 4 cm in Week 2, the total growth is:

Explanation:

Link:

Question (25)

A student places a plant inside a box with a small opening for light. The shoot is expected to grow:

Explanation:

Link:

Question (26)

Which activity best demonstrates growth rather than movement?

Explanation:

Link:

Question (27)

A root grows 2 cm every 5 days. How much will it grow in 15 days?

Explanation:

Link:

Question (28)

The growth of roots downward helps a plant mainly to:

Explanation:

Link:

Question (29)

A shoot measures 7 cm initially and 19 cm after some days. What is the growth?

Explanation:

Link:

Question (30)

Which observation provides evidence that plant growth is directional?

Explanation:

Link:

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