Plant Growth and Development Practice Questions

NEET · Biology · 995 free MCQs with instant results and detailed explanations.

995

Total

210

Easy

451

Medium

334

Hard

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Topics in Plant Growth and Development

Phases of Growth 256

Photoperiodism 258

Plant Hormones 247

Vernalisation 234

Sample Questions from Plant Growth and Development

Here are 10 sample questions. Start a quiz to get randomized questions with scoring.

Easy

Which phase of plant growth is characterized by rapid cell division and elongation?

A. Lag phase

B. Log phase

C. Stationary phase

D. Decline phase

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Correct Answer: B

The Log phase is where rapid cell division and elongation occur, leading to significant growth in plants.

Easy

In which phase do plants primarily focus on increasing their biomass?

A. Lag phase

B. Log phase

C. Maturity phase

D. Decline phase

Show Answer & Explanation

Correct Answer: C

During the Maturity phase, plants focus on increasing their biomass as they have already established roots and leaves.

Easy

What is the initial phase of growth in plants called?

A. Lag phase

B. Log phase

C. Maturity phase

D. Senescence phase

Show Answer & Explanation

Correct Answer: A

The initial phase of growth in plants is known as the Lag phase, where growth is slow as the plant acclimatizes.

Medium

During which phase of growth do plants typically show a balance between growth and decay?

A. Lag phase

B. Log phase

C. Stationary phase

D. Decline phase

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Correct Answer: C

The stationary phase is marked by a balance between growth and decay, where biomass remains relatively constant.

Medium

Which hormone is primarily responsible for promoting elongation in the log phase of plant growth?

A. Cytokinins

B. Auxins

C. Gibberellins

D. Abscisic acid

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Correct Answer: B

Auxins are the primary hormones that promote cell elongation and are crucial during the log phase of growth.

Medium

In which phase of growth would you expect to see the highest rate of photosynthesis per unit leaf area?

A. Lag phase

B. Log phase

C. Stationary phase

D. Decline phase

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Correct Answer: B

During the log phase, plants are actively growing and have a high rate of photosynthesis to support their growth.

Medium

Which of the following factors can limit growth during the decline phase?

A. Abundant nutrients

B. Water stress

C. High temperatures

D. High light intensity

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Correct Answer: B

Water stress is a significant limiting factor during the decline phase, as insufficient water affects plant health and growth.

Hard

Which phase of plant growth is primarily characterized by cell division and differentiation, leading to the formation of new tissues?

A. Maturation phase

B. Lag phase

C. Log phase

D. Senescence phase

Show Answer & Explanation

Correct Answer: C

The log phase, also known as the exponential phase, is where rapid cell division and differentiation occur, leading to significant growth.

Hard

During which phase of plant growth does the plant typically show the fastest rate of increase in biomass?

A. Maturation phase

B. Lag phase

C. Log phase

D. Senescence phase

Show Answer & Explanation

Correct Answer: C

In the log phase, the plant experiences rapid cell division and growth, resulting in the highest increase in biomass.

Q10

Hard

In which phase do plants primarily prepare for reproduction and allocate resources for seed development?

A. Maturation phase

B. Lag phase

C. Log phase

D. Senescence phase

Show Answer & Explanation

Correct Answer: A

In the maturation phase, plants focus on preparing for reproduction, including resource allocation for seed development.

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Plant Growth and Development — NEET Biology Practice Questions Online

This page contains 995 practice MCQs for the chapter Plant Growth and Development in NEET Biology. The questions are organized by difficulty — 210 easy, 451 medium, 334 hard — so you can choose the right level for your preparation.

Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit. This chapter covers 4 topics, giving you comprehensive coverage of the entire chapter.