NEET UG · Biology · Plant Growth and Development

Plant Growth and Differentiation: NEET previous year questions

6 questions in ten years of NEET, in 6 of 10 papers. Pattern: Every year. Here is how it is asked and which ideas come back.

Asked in 10 years: 6; about 0.6 per paper
Years asked: 6/10; last asked 2026
Chance of a question next paper: 50%; historical rate, how we compute it
Weighted estimate: 0.7; model; history: 0.6 a paper on average, typically 0–1

Key findings

01
Asked in 6 of 10 papers, 6 questions in all: #126 of 204 topics by ten-year total. It comes back every 1.2 years on average.
02
67% of its questions since 2018 tested an idea never asked before; 1 repeated an idea from the year before.
03
The most repeated idea is Dedifferentiation and Redifferentiation, asked 3 times (2021, 2023, 2024), usually as “name the phenomenon in tissue culture”.
04
NEET has asked 0 of the 7 ideas in this topic; 0 have never been asked, directly or indirectly.
05
Mostly asked as one-line MCQ (83%); 83% easy, 0% hard.

Questions per year

Up to 2023: 0.5; per paper
Since 2024: 0.6; 0.1
Usual gap: 1.2 yrs; between papers asking it
Swing: ±0.5; questions, year to year

How it is asked

Difficulty, format and skill

Across all 6 questions on Plant Growth and Differentiation since 2017.

Difficulty

QUESTIONS

Easy5 · 83%
Medium1 · 17%
Hard0 · 0%

Format

One-line MCQ · 5 Q83%
Numerical · 1 Q17%

Skill tested

Recall · 5 Q83%
Calculation · 1 Q17%

Repeats

New idea, or one asked before?

Each column is a paper. Blue questions tested an idea NEET had not asked before; navy ones went back to an idea from an earlier paper. 2017 is the first paper, so everything in it counts as new.

’17’18’19’20’21’22’23’24’25’26

Idea asked for the first time
Idea asked in an earlier paper

Coverage of the topic

NEET has asked 0 of the 7 ideas in this topic. 0 have never been asked yet.

Asked directly0 · 0%
Touched inside another question7 · 100%
Never asked0 · 0%

Ideas come from Lumi’s syllabus map of NCERT. A never-asked idea is not a safe skip: most new questions come from exactly these.

Drill down

Idea, year, question

Every idea NEET tested in this topic, with its ten papers. Open one to read the questions.

ideaAskedShareYears’17’18’19’20’21’22’23’24’25’26

Repeated3 · 50%50%3/10
- 2024 · Q104
  Formation of interfascicular cambium from fully developed parenchyma cells is an example for
  easyOne-line MCQAsked the year before
- 2023 · Q124
  In tissue culture experiments, leaf mesophyll cells are put in a culture medium to form callus. This phenomenon may be called as :
  easyOne-line MCQ
- 2021 · Q126
  Plants follow different pathways in response to environment or phases of life to form different kinds of structures. This ability is…
  easyOne-line MCQNew idea
1 · 17%17%1/10
1 · 17%17%1/10
1 · 17%17%1/10

Squares are the ten papers, 2017 to 2026; darker means more questions. Share is of the level above.

Ideas

Every idea inside this topic

4 different ideas were tested; 1 came more than once.

Dedifferentiation and Redifferentiation3×
name the phenomenon in tissue culture
One-line MCQ · 6% next
Arithmetic and Geometric Growth1×
numerical
Numerical · 6% next
Plasticity and Heterophylly1×
identify plant lacking a feature
One-line MCQ · 4% next
Sigmoid Growth Curve1×
identify phase of growth curve
One-line MCQ · 4% next

Idea	Times	Format	Chance next	Foundation for
Dedifferentiation and Redifferentiationname the phenomenon in tissue culture	3	One-line MCQRecall	6%	–
Arithmetic and Geometric Growthnumerical	1	NumericalCalculation	6%	–
Plasticity and Heterophyllyidentify plant lacking a feature	1	One-line MCQRecall	4%	–
Sigmoid Growth Curveidentify phase of growth curve	1	One-line MCQRecall	4%	–

Chance next is the historical rate at which an idea with this record came back in the following paper. It is low for every idea, which is why learning the topic beats memorising past questions. All repeated ideas

Every question

Plant Growth and Differentiation questions, year by year

The opening words of each question as it appeared in the official paper, with the idea it tested.

NEET 20261 question

Q133
Length of the stem at time 0 is 20 cm. The arithmetic growth rate is 30 cm per day. What is the length of the stem at the end of the 7th…
Idea: Arithmetic and Geometric Growth
New ideaEasyNumerical

NEET 20241 question

Q104
Formation of interfascicular cambium from fully developed parenchyma cells is an example for
Idea: Dedifferentiation and Redifferentiation
Asked last yearEasyOne-line MCQ

NEET 20231 question

Q124
In tissue culture experiments, leaf mesophyll cells are put in a culture medium to form callus. This phenomenon may be called as :
Idea: Dedifferentiation and Redifferentiation
EasyOne-line MCQ

NEET 20221 question

Q105
Which one of the following plants does not show plasticity ?
Idea: Plasticity and Heterophylly
New ideaMediumOne-line MCQ

NEET 20211 question

Q126
Plants follow different pathways in response to environment or phases of life to form different kinds of structures. This ability is…
Idea: Dedifferentiation and Redifferentiation
New ideaEasyOne-line MCQ

NEET 20201 question

Q2
The process of growth is maximum during :
Idea: Sigmoid Growth Curve
New ideaEasyOne-line MCQ

Questions from the official NEET UG papers published by NTA (CBSE before 2019). Topic and idea tags, counts and notes are Lumi’s.