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. Which enzyme is responsible for carbon fixation in the Calvin cycle?
A.
Rubisco
B.
ATP synthase
C.
NADP+ reductase
D.
Phosphofructokinase
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Solution
Rubisco is the enzyme that catalyzes the fixation of carbon dioxide in the Calvin cycle.
Correct Answer:
A
— Rubisco
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Q. Which enzyme is responsible for fixing carbon dioxide in the Calvin cycle?
A.
Rubisco
B.
ATP synthase
C.
NADP+ reductase
D.
Phosphofructokinase
Show solution
Solution
Rubisco is the enzyme that catalyzes the fixation of carbon dioxide in the Calvin cycle.
Correct Answer:
A
— Rubisco
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Q. Which essential oil, derived from a plant, is known for its antimicrobial properties?
A.
Lavender
B.
Peppermint
C.
Tea Tree
D.
Rosemary
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Solution
Tea Tree oil is well-known for its strong antimicrobial properties.
Correct Answer:
C
— Tea Tree
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Q. Which evolutionary concept explains the adaptation of plants to their environment over time?
A.
Survival of the fittest
B.
Adaptive radiation
C.
Niche differentiation
D.
Phenotypic plasticity
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Solution
Survival of the fittest explains how plants adapt to their environment over time, with those best suited to their conditions surviving and reproducing.
Correct Answer:
A
— Survival of the fittest
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Q. Which evolutionary concept explains the development of new species from a common ancestor due to geographic isolation?
A.
Allopatric speciation
B.
Sympatric speciation
C.
Parapatric speciation
D.
Adaptive radiation
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Solution
Allopatric speciation occurs when new species develop from a common ancestor due to geographic isolation, leading to reproductive isolation.
Correct Answer:
A
— Allopatric speciation
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Q. Which evolutionary concept explains the development of new species from a common ancestor?
A.
Speciation
B.
Extinction
C.
Adaptation
D.
Migration
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Solution
Speciation is the evolutionary concept that explains the development of new species from a common ancestor.
Correct Answer:
A
— Speciation
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Q. Which evolutionary concept explains the development of similar traits in unrelated plant species due to similar environmental pressures?
A.
Convergent evolution
B.
Divergent evolution
C.
Co-evolution
D.
Parallel evolution
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Solution
Convergent evolution explains the development of similar traits in unrelated species due to similar environmental pressures.
Correct Answer:
A
— Convergent evolution
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Q. Which evolutionary concept explains the emergence of new plant species from a common ancestor?
A.
Speciation
B.
Extinction
C.
Hybridization
D.
Gene flow
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Solution
Speciation is the evolutionary process through which new plant species arise from a common ancestor.
Correct Answer:
A
— Speciation
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Q. Which evolutionary concept explains the emergence of new species from a common ancestor?
A.
Speciation
B.
Extinction
C.
Hybridization
D.
Symbiosis
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Solution
Speciation is the evolutionary process through which new species arise from a common ancestor.
Correct Answer:
A
— Speciation
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Q. Which evolutionary concept explains the similarities between unrelated plant species due to adaptation to similar environments?
A.
Convergent evolution
B.
Divergent evolution
C.
Parallel evolution
D.
Co-evolution
Show solution
Solution
Convergent evolution explains the similarities between unrelated species that adapt to similar environments.
Correct Answer:
A
— Convergent evolution
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Q. Which evolutionary process is responsible for the development of new species from a common ancestor?
A.
Speciation
B.
Extinction
C.
Hybridization
D.
Convergent evolution
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Solution
Speciation is the evolutionary process through which new species arise from a common ancestor.
Correct Answer:
A
— Speciation
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Q. Which factor can limit the efficiency of photosynthesis in plants?
A.
Temperature
B.
Water availability
C.
Carbon dioxide concentration
D.
All of the above
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Solution
All of these factors can limit the efficiency of photosynthesis in plants.
Correct Answer:
D
— All of the above
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Q. Which factor does NOT affect the rate of photosynthesis?
A.
Light intensity
B.
Carbon dioxide concentration
C.
Soil pH
D.
Temperature
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Solution
Soil pH does not directly affect the rate of photosynthesis.
Correct Answer:
C
— Soil pH
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Q. Which factor does NOT directly affect the rate of photosynthesis?
A.
Light intensity
B.
Temperature
C.
Soil pH
D.
Carbon dioxide concentration
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Solution
Soil pH does not directly affect the rate of photosynthesis; it affects plant health indirectly.
Correct Answer:
C
— Soil pH
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Q. Which gas is a byproduct of the light reactions?
A.
Carbon dioxide
B.
Nitrogen
C.
Oxygen
D.
Methane
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Solution
Oxygen is released as a byproduct of the light reactions of photosynthesis.
Correct Answer:
C
— Oxygen
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Q. Which gas is consumed during the dark reactions of photosynthesis?
A.
Oxygen
B.
Nitrogen
C.
Carbon dioxide
D.
Hydrogen
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Solution
Carbon dioxide is consumed during the dark reactions (Calvin cycle) of photosynthesis.
Correct Answer:
C
— Carbon dioxide
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Q. Which gas is consumed during the process of photosynthesis?
A.
Oxygen
B.
Nitrogen
C.
Carbon dioxide
D.
Hydrogen
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Solution
Carbon dioxide is taken in by plants during photosynthesis to produce glucose.
Correct Answer:
C
— Carbon dioxide
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Q. Which gas is taken in by plants during photosynthesis?
A.
Oxygen
B.
Nitrogen
C.
Carbon dioxide
D.
Hydrogen
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Solution
Plants take in carbon dioxide from the atmosphere during photosynthesis.
Correct Answer:
C
— Carbon dioxide
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Q. Which group of plants is characterized by having seeds but no flowers?
A.
Angiosperms
B.
Bryophytes
C.
Gymnosperms
D.
Ferns
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Solution
Gymnosperms are characterized by having seeds but no flowers.
Correct Answer:
C
— Gymnosperms
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Q. Which group of plants is characterized by the presence of seeds but not flowers?
A.
Bryophytes
B.
Angiosperms
C.
Gymnosperms
D.
Ferns
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Solution
Gymnosperms are seed-producing plants that do not form flowers or fruits, unlike angiosperms.
Correct Answer:
C
— Gymnosperms
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Q. Which group of plants is characterized by the presence of seeds?
A.
Bryophytes
B.
Pteridophytes
C.
Gymnosperms
D.
Mosses
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Solution
Gymnosperms are a group of seed-producing plants that include conifers.
Correct Answer:
C
— Gymnosperms
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Q. Which group of plants is considered the most evolutionarily advanced due to their complex reproductive structures?
A.
Bryophytes
B.
Ferns
C.
Gymnosperms
D.
Angiosperms
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Solution
Angiosperms, or flowering plants, are considered the most evolutionarily advanced due to their complex reproductive structures and mechanisms.
Correct Answer:
D
— Angiosperms
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Q. Which group of plants is considered the most evolutionarily advanced?
A.
Bryophytes
B.
Ferns
C.
Gymnosperms
D.
Angiosperms
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Solution
Angiosperms, or flowering plants, are considered the most evolutionarily advanced due to their complex reproductive structures.
Correct Answer:
D
— Angiosperms
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Q. Which group of plants is known for having a dominant sporophyte generation?
A.
Mosses
B.
Ferns
C.
Liverworts
D.
Green algae
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Solution
Ferns exhibit a dominant sporophyte generation, which is the diploid phase that produces spores.
Correct Answer:
B
— Ferns
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Q. Which group of plants is known for producing seeds?
A.
Bryophytes
B.
Pteridophytes
C.
Gymnosperms
D.
Mosses
Show solution
Solution
Gymnosperms are a group of seed-producing plants that include conifers, which produce seeds that are not enclosed in an ovary.
Correct Answer:
C
— Gymnosperms
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Q. Which hormone is primarily involved in regulating stomatal closure?
A.
Auxin
B.
Gibberellin
C.
Abscisic acid
D.
Cytokinin
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Solution
Abscisic acid is the hormone that signals stomata to close in response to water stress, reducing water loss.
Correct Answer:
C
— Abscisic acid
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Q. Which light wavelength is most effective for photosynthesis?
A.
Green light
B.
Red light
C.
Blue light
D.
Yellow light
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Solution
Blue light is most effective for photosynthesis as it is absorbed efficiently by chlorophyll.
Correct Answer:
C
— Blue light
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Q. Which method of plant reproduction involves the use of cuttings?
A.
Sexual reproduction
B.
Asexual reproduction
C.
Pollination
D.
Grafting
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Solution
Using cuttings is a form of asexual reproduction where a part of the plant is used to grow a new individual.
Correct Answer:
B
— Asexual reproduction
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Q. Which method of plant reproduction is commonly used in agriculture to produce clones of a desired plant?
A.
Sexual reproduction
B.
Cross-pollination
C.
Asexual reproduction
D.
Seed dispersal
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Solution
Asexual reproduction, such as cuttings or grafting, allows farmers to produce genetically identical plants with desirable traits.
Correct Answer:
C
— Asexual reproduction
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Q. Which method of reproduction involves the use of spores?
A.
Asexual reproduction
B.
Sexual reproduction
C.
Vegetative propagation
D.
Grafting
Show solution
Solution
Asexual reproduction in plants often involves the use of spores, which can develop into new individuals.
Correct Answer:
A
— Asexual reproduction
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