Botany is the branch of Biology that focuses on the study of plants , their structure, functions, growth, reproduction, and role in the environment. This category is curated for school students (Classes 6–12) and undergraduate learners to build strong fundamentals with exam-focused clarity.
In this section, you’ll explore:
Plant morphology, anatomy, and physiology explained step-by-step
Reproduction in plants , development, and life cycles
Cell biology, genetics, and biotechnology concepts related to plants
Ecology and plant diversity with real-world relevance
Important questions, MCQs, diagrams, and revision notes for exams
The content is aligned with NCERT , school boards, and UG syllabi , making it highly useful for school exams, NEET preparation, and college assessments . Concepts are explained in simple language with a focus on understanding, not rote learning.
Build a strong foundation in plant sciences and master Botany with confidence.
Q. What are the two main stages of photosynthesis?
A.
Light reactions and Calvin cycle
B.
Respiration and Fermentation
C.
Transpiration and Absorption
D.
Glycolysis and Krebs cycle
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Solution
Photosynthesis consists of light reactions and the Calvin cycle.
Correct Answer:
A
— Light reactions and Calvin cycle
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Q. What environmental factor is most critical for seed germination?
A.
Light
B.
Temperature
C.
Soil type
D.
Humidity
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Solution
Temperature is a critical factor for seed germination, as it affects metabolic processes.
Correct Answer:
B
— Temperature
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Q. What gas is primarily consumed during the respiration process in plants?
A.
Oxygen
B.
Carbon dioxide
C.
Nitrogen
D.
Hydrogen
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Solution
Oxygen is primarily consumed during respiration, as it is used to oxidize glucose to release energy.
Correct Answer:
A
— Oxygen
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Q. What gas is produced as a byproduct of photosynthesis?
A.
Oxygen
B.
Carbon dioxide
C.
Nitrogen
D.
Hydrogen
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Solution
Oxygen is produced as a byproduct of photosynthesis during the light reactions.
Correct Answer:
A
— Oxygen
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Q. What is a common application of CRISPR technology in plants?
A.
Creating clones of plants
B.
Editing specific genes for desired traits
C.
Increasing photosynthesis efficiency
D.
Enhancing seed germination
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Solution
CRISPR technology allows for precise editing of specific genes to enhance traits such as disease resistance.
Correct Answer:
B
— Editing specific genes for desired traits
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Q. What is a common application of plant tissue culture in biotechnology?
A.
Pest control
B.
Plant breeding
C.
Propagation of disease-free plants
D.
Soil improvement
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Solution
Plant tissue culture is widely used to propagate disease-free plants, ensuring healthy stock for agriculture.
Correct Answer:
C
— Propagation of disease-free plants
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Q. What is a major benefit of using genetically modified crops?
A.
Increased nutritional value
B.
Higher yield and pest resistance
C.
Reduced need for pesticides
D.
All of the above
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Solution
Genetically modified crops can provide increased nutritional value, higher yield, pest resistance, and reduced pesticide use.
Correct Answer:
D
— All of the above
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Q. What is a phenotype ratio of a dihybrid cross?
A.
1:1
B.
3:1
C.
9:3:3:1
D.
1:2:1
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Solution
A dihybrid cross typically results in a 9:3:3:1 phenotypic ratio, representing the combinations of two traits.
Correct Answer:
C
— 9:3:3:1
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Q. What is adaptive radiation in the context of plant evolution?
A.
The process of plants adapting to a single environment
B.
The diversification of a group of organisms into forms filling different ecological niches
C.
The extinction of plant species due to environmental changes
D.
The gradual change of plant species over time
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Solution
Adaptive radiation refers to the diversification of a group of organisms into various forms that adapt to different ecological niches.
Correct Answer:
B
— The diversification of a group of organisms into forms filling different ecological niches
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Q. What is apomixis in plants?
A.
A form of sexual reproduction
B.
A form of asexual reproduction without fertilization
C.
The process of pollination
D.
The formation of seeds from ovules
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Solution
Apomixis is a form of asexual reproduction where seeds are produced without fertilization.
Correct Answer:
B
— A form of asexual reproduction without fertilization
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Q. What is photolysis in the context of photosynthesis?
A.
Splitting of water molecules
B.
Formation of glucose
C.
Absorption of light
D.
Release of oxygen
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Solution
Photolysis refers to the splitting of water molecules during the light-dependent reactions.
Correct Answer:
A
— Splitting of water molecules
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Q. What is photophosphorylation?
A.
Synthesis of glucose
B.
Production of ATP using light energy
C.
Conversion of NADP+ to NADPH
D.
Splitting of water molecules
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Solution
Photophosphorylation is the process of producing ATP using light energy during photosynthesis.
Correct Answer:
B
— Production of ATP using light energy
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A.
Growth towards light
B.
Growth away from light
C.
Growth in response to gravity
D.
Growth in response to water
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Solution
Phototropism is the growth of a plant towards light, driven by auxin distribution.
Correct Answer:
A
— Growth towards light
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Q. What is produced as a byproduct of the light reactions?
A.
Glucose
B.
Oxygen
C.
NADPH
D.
ATP
Show solution
Solution
Oxygen is released as a byproduct of the light reactions during the splitting of water.
Correct Answer:
B
— Oxygen
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Q. What is produced as a byproduct of the light-dependent reactions of photosynthesis?
A.
Glucose
B.
Oxygen
C.
NADPH
D.
ATP
Show solution
Solution
Oxygen is produced as a byproduct of the light-dependent reactions.
Correct Answer:
B
— Oxygen
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Q. What is produced during the light reactions of photosynthesis?
A.
Glucose
B.
Oxygen
C.
NADPH
D.
Both Oxygen and NADPH
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Solution
Both oxygen and NADPH are produced during the light reactions.
Correct Answer:
D
— Both Oxygen and NADPH
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Q. What is produced during the light-dependent reactions of photosynthesis?
A.
Glucose
B.
Oxygen
C.
NADPH
D.
Both B and C
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Solution
Oxygen and NADPH are produced during the light-dependent reactions.
Correct Answer:
D
— Both B and C
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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 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 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 chloroplasts found in a typical mesophyll cell?
A.
1-10
B.
10-50
C.
50-100
D.
100-200
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Solution
A typical mesophyll cell contains about 10 to 50 chloroplasts.
Correct Answer:
B
— 10-50
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Q. What is the average number of ovules per ovary in a typical angiosperm?
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Solution
On average, a typical angiosperm ovary contains about 10 ovules.
Correct Answer:
C
— 10
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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
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Solution
A single sunflower head can produce around 1000 seeds on average.
Correct Answer:
C
— 1000
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Q. What is the average number of stomata per square millimeter on a leaf?
A.
10-100
B.
100-500
C.
500-1000
D.
1000-5000
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Solution
The average number of stomata per square millimeter on a leaf is typically between 100 and 500.
Correct Answer:
B
— 100-500
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Q. What is the average size range of a typical plant cell?
A.
1-10 micrometers
B.
10-100 micrometers
C.
100-1000 micrometers
D.
1-10 millimeters
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Solution
Most plant cells range from 10 to 100 micrometers in size.
Correct Answer:
B
— 10-100 micrometers
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Q. What is the effect of increased carbon dioxide concentration on photosynthesis?
A.
Decreases rate
B.
Increases rate
C.
No effect
D.
Stops photosynthesis
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Solution
Increased carbon dioxide concentration generally increases the rate of photosynthesis, up to a certain point.
Correct Answer:
B
— Increases rate
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Q. What is the effect of increased light intensity on the rate of photosynthesis, assuming other factors are constant?
A.
Decreases rate
B.
Increases rate
C.
No effect
D.
Stops photosynthesis
Show solution
Solution
Increased light intensity generally increases the rate of photosynthesis, up to a certain point.
Correct Answer:
B
— Increases rate
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Q. What is the effect of increased light intensity on the rate of photosynthesis, assuming other factors are optimal?
A.
Decreases rate
B.
Increases rate
C.
No effect
D.
Stops photosynthesis
Show solution
Solution
Increased light intensity generally increases the rate of photosynthesis, up to a certain point.
Correct Answer:
B
— Increases rate
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Q. What is the effect of light intensity on the rate of photosynthesis?
A.
Increases then decreases
B.
Decreases
C.
Increases
D.
No effect
Show solution
Solution
The rate of photosynthesis generally increases with light intensity up to a certain point.
Correct Answer:
C
— Increases
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Q. What is the end product of anaerobic respiration in plants?
A.
Lactic acid
B.
Ethanol
C.
Carbon dioxide
D.
Glucose
Show solution
Solution
The end product of anaerobic respiration in plants is ethanol, which is produced when oxygen is not available.
Correct Answer:
B
— Ethanol
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