This section focuses on numerical, quantitative, and data-based problems related to plant growth and development. It is designed for Class 11–12 students , NEET aspirants , and undergraduate learners who want to strengthen their ability to apply growth concepts through calculations and data interpretation.
In this section, you will practice:
Numericals based on growth rate, absolute growth, and relative growth
Calculations involving growth kinetics and sigmoid growth curves
Data-based questions on effects of plant growth regulators
Graph interpretation related to growth phases and developmental stages
Quantitative analysis of environmental factors affecting growth
NCERT-aligned numerical questions and exam-oriented practice sets
The content is structured to improve step-by-step calculation skills , enhance data interpretation , and help students confidently handle numerical and graph-based questions in school examinations, NEET, and undergraduate assessments .
Develop speed and accuracy in solving numerical applications related to plant growth and development through systematic practice.
Q. At what temperature do most seeds begin to germinate?
A.
0°C
B.
10°C
C.
20°C
D.
30°C
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Solution
Most seeds begin to germinate at around 20°C, although this can vary by species.
Correct Answer:
C
— 20°C
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Q. At what temperature range do most plants grow best?
A.
0-10°C
B.
10-20°C
C.
20-30°C
D.
30-40°C
Show solution
Solution
Most plants grow best in the temperature range of 20-30°C.
Correct Answer:
C
— 20-30°C
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Q. How many chromosomes do most diploid plants have?
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Solution
Most diploid plants have 20 chromosomes, as they typically have two sets of 10.
Correct Answer:
B
— 20
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Q. How many days does it typically take for a tomato seed to germinate?
A.
3-5 days
B.
7-10 days
C.
14-21 days
D.
30 days
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Solution
Tomato seeds typically germinate in 7-10 days under optimal conditions.
Correct Answer:
B
— 7-10 days
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Q. How many hours of light do most plants require for optimal photosynthesis per day?
A.
6 hours
B.
12 hours
C.
18 hours
D.
24 hours
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Solution
Most plants require around 12 hours of light for optimal photosynthesis.
Correct Answer:
B
— 12 hours
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Q. How many leaves does a typical bean plant produce in its first month of growth?
A.
2 leaves
B.
4 leaves
C.
6 leaves
D.
8 leaves
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Solution
A typical bean plant can produce around 6 leaves in its first month of growth.
Correct Answer:
C
— 6 leaves
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Q. How many seeds can a single sunflower head produce?
A.
100 seeds
B.
500 seeds
C.
1000 seeds
D.
2000 seeds
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Solution
A single sunflower head can produce around 1000 seeds, depending on the variety.
Correct Answer:
C
— 1000 seeds
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Q. How many stages are there in the typical life cycle of a flowering plant?
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Solution
The typical life cycle of a flowering plant includes 4 stages: germination, growth, reproduction, and death.
Correct Answer:
C
— 4
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Q. How many types of plant hormones are primarily involved in growth regulation?
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Solution
There are 4 primary types of plant hormones involved in growth regulation: auxins, gibberellins, cytokinins, and abscisic acid.
Correct Answer:
B
— 4
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Q. What is the average growth rate of a typical tree in cm per year?
A.
10 cm
B.
20 cm
C.
30 cm
D.
40 cm
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Solution
On average, many tree species grow about 20 cm per year under optimal conditions.
Correct Answer:
B
— 20 cm
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Q. What is the average height increase of a corn plant per week during its peak growth phase?
A.
1 cm
B.
5 cm
C.
10 cm
D.
15 cm
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Solution
During its peak growth phase, a corn plant can increase in height by about 10 cm per week.
Correct Answer:
C
— 10 cm
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Q. What is the average height of a fully grown bamboo plant?
A.
5 m
B.
10 m
C.
15 m
D.
20 m
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Solution
The average height of a fully grown bamboo plant can reach up to 15 m.
Correct Answer:
C
— 15 m
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Q. What is the average lifespan of a biennial plant?
A.
1 year
B.
2 years
C.
3 years
D.
5 years
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Solution
Biennial plants typically have a lifespan of 2 years, completing their life cycle in that time.
Correct Answer:
B
— 2 years
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Q. What is the average lifespan of a typical herbaceous plant?
A.
1 year
B.
2 years
C.
5 years
D.
10 years
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Solution
The average lifespan of a typical herbaceous plant is about 1 year.
Correct Answer:
A
— 1 year
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Q. What is the average number of flowers produced by a mature apple tree in a season?
A.
100 flowers
B.
500 flowers
C.
1000 flowers
D.
2000 flowers
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Solution
A mature apple tree can produce around 1000 flowers in a season, depending on the variety and conditions.
Correct Answer:
C
— 1000 flowers
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Q. What is the average number of seeds produced by a single sunflower head?
A.
100
B.
500
C.
1000
D.
2000
Show solution
Solution
A single sunflower head can produce around 1000 seeds on average.
Correct Answer:
C
— 1000
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Q. What is the ideal soil pH range for most crops?
A.
4.0 - 5.0
B.
5.5 - 7.0
C.
7.5 - 8.5
D.
9.0 - 10.0
Show solution
Solution
The ideal soil pH range for most crops is between 5.5 and 7.0.
Correct Answer:
B
— 5.5 - 7.0
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Q. What is the typical percentage of water content in a healthy plant?
A.
50%
B.
70%
C.
90%
D.
100%
Show solution
Solution
Healthy plants typically contain about 70% water by weight.
Correct Answer:
B
— 70%
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