The diversity in the living world explains the vast variety of organisms found on Earth and the need for their systematic classification. This category focuses on understanding biological diversity, taxonomy, and classification systems , making it suitable for school students (Classes 9–12) , NEET aspirants , and undergraduate learners .
In this section, you will study:
Meaning and scope of biological diversity
Taxonomy and systematics
Binomial nomenclature and taxonomic hierarchy
Classification of living organisms
Major groups such as plants, animals, and microorganisms
Tools and rules used for identification and classification
NCERT-based explanations, diagrams, MCQs, and exam-oriented questions
The content is structured to strengthen conceptual understanding , improve classification-based questions , and help students score better in school exams, NEET, and undergraduate assessments .
Develop a clear understanding of how living organisms are classified and appreciate the diversity of life in an organized and scientific way.
Q. In which part of the plant does photosynthesis primarily occur?
A.
Roots
B.
Stems
C.
Leaves
D.
Flowers
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Solution
Photosynthesis primarily occurs in the leaves, where chloroplasts are abundant.
Correct Answer:
C
— Leaves
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Q. What is the main function of the xylem in vascular plants?
A.
Transport of sugars
B.
Transport of water and minerals
C.
Photosynthesis
D.
Storage of nutrients
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Solution
Xylem is responsible for the transport of water and minerals from roots to other parts.
Correct Answer:
B
— Transport of water and minerals
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Q. What is the main purpose of the plant cuticle?
A.
Photosynthesis
B.
Water retention
C.
Nutrient absorption
D.
Gas exchange
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Solution
The cuticle helps in water retention by reducing water loss.
Correct Answer:
B
— Water retention
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Q. What is the main role of mycorrhizal fungi in plant ecology?
A.
Photosynthesis
B.
Nutrient absorption
C.
Seed dispersal
D.
Pollination
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Solution
Mycorrhizal fungi form symbiotic relationships with plant roots, enhancing nutrient absorption, particularly phosphorus.
Correct Answer:
B
— Nutrient absorption
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Q. What is the primary function of the xylem in vascular plants?
A.
Transporting sugars
B.
Transporting water and minerals
C.
Storing nutrients
D.
Photosynthesis
Show solution
Solution
The xylem is responsible for transporting water and dissolved minerals from the roots to the rest of the plant.
Correct Answer:
B
— Transporting water and minerals
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Q. What is the primary method of seed dispersal for dandelions?
A.
Water
B.
Wind
C.
Animals
D.
Gravity
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Solution
Dandelions use wind dispersal, with their lightweight seeds attached to parachute-like structures.
Correct Answer:
B
— Wind
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Q. What is the primary purpose of plant stomata?
A.
Nutrient storage
B.
Gas exchange
C.
Water retention
D.
Root anchorage
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Solution
Stomata are small openings on the leaf surface that facilitate gas exchange, allowing carbon dioxide in and oxygen out.
Correct Answer:
B
— Gas exchange
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Q. What is the primary purpose of the flower in angiosperms?
A.
Photosynthesis
B.
Water storage
C.
Reproduction
D.
Nutrient absorption
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Solution
The primary purpose of the flower in angiosperms is reproduction, facilitating pollination and seed formation.
Correct Answer:
C
— Reproduction
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Q. What is the primary purpose of the plant cuticle?
A.
Photosynthesis
B.
Water retention
C.
Nutrient storage
D.
Gas exchange
Show solution
Solution
The cuticle is a waxy layer that helps prevent water loss from the plant surface, aiding in water retention.
Correct Answer:
B
— Water retention
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Q. What is the primary role of mycorrhizal fungi in plant ecology?
A.
Photosynthesis
B.
Nutrient absorption
C.
Seed dispersal
D.
Pollination
Show solution
Solution
Mycorrhizal fungi enhance nutrient absorption for plants.
Correct Answer:
B
— Nutrient absorption
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Q. What is the role of mycorrhizae in plant ecology?
A.
Water storage
B.
Nutrient absorption
C.
Photosynthesis
D.
Seed dispersal
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Solution
Mycorrhizae enhance nutrient absorption for plants, particularly phosphorus.
Correct Answer:
B
— Nutrient absorption
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Q. What is the term for the relationship between plants and pollinators?
A.
Mutualism
B.
Commensalism
C.
Parasitism
D.
Competition
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Solution
The relationship between plants and pollinators is a mutualistic one, where both parties benefit from the interaction.
Correct Answer:
A
— Mutualism
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Q. What is the term for the study of plant classification?
A.
Botany
B.
Phytology
C.
Taxonomy
D.
Morphology
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Solution
Taxonomy is the science of classification of living organisms, including plants.
Correct Answer:
C
— Taxonomy
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Q. What type of leaf arrangement is characterized by leaves that grow in pairs on opposite sides of the stem?
A.
Alternate
B.
Whorled
C.
Opposite
D.
Rosette
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Solution
Opposite leaf arrangement features pairs of leaves growing directly across from each other on the stem.
Correct Answer:
C
— Opposite
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Q. What type of plant is characterized by having needle-like leaves?
A.
Deciduous trees
B.
Conifers
C.
Ferns
D.
Cacti
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Solution
Conifers, such as pines and spruces, are known for their needle-like leaves which help reduce water loss.
Correct Answer:
B
— Conifers
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Q. What type of plant tissue is responsible for photosynthesis?
A.
Xylem
B.
Phloem
C.
Parenchyma
D.
Sclerenchyma
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Solution
Parenchyma cells, particularly in leaves, are primarily responsible for photosynthesis.
Correct Answer:
C
— Parenchyma
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Q. What type of plant tissue is responsible for the transport of water and minerals?
A.
Phloem
B.
Xylem
C.
Cortex
D.
Parenchyma
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Solution
Xylem is the plant tissue responsible for the transport of water and dissolved minerals from the roots to the rest of the plant.
Correct Answer:
B
— Xylem
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Q. What type of plant tissue is responsible for the transport of water?
A.
Phloem
B.
Xylem
C.
Cortex
D.
Parenchyma
Show solution
Solution
Xylem is the plant tissue responsible for the transport of water and minerals from roots to leaves.
Correct Answer:
B
— Xylem
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Q. What type of symmetry is exhibited by most flowers?
A.
Radial symmetry
B.
Bilateral symmetry
C.
Asymmetry
D.
None of the above
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Solution
Most flowers exhibit radial symmetry, allowing for multiple lines of symmetry.
Correct Answer:
A
— Radial symmetry
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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 of the following is a characteristic feature of gymnosperms?
A.
Flowers
B.
Fruits
C.
Naked seeds
D.
Broad leaves
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Solution
Gymnosperms are known for having naked seeds, which are not enclosed in an ovary.
Correct Answer:
C
— Naked seeds
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Q. Which of the following is a characteristic feature of monocots?
A.
Two seed leaves
B.
Parallel leaf venation
C.
Woody stems
D.
Taproot system
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Solution
Monocots, such as grasses, are characterized by parallel leaf venation and typically have one seed leaf.
Correct Answer:
B
— Parallel leaf venation
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Q. Which of the following is a characteristic of angiosperms?
A.
Seedless
B.
Naked seeds
C.
Flowers and fruits
D.
Vascular tissue
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Solution
Angiosperms are characterized by the presence of flowers and fruits, which aid in reproduction and seed dispersal.
Correct Answer:
C
— Flowers and fruits
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Q. Which of the following is a characteristic of gymnosperms?
A.
Flowers
B.
Fruits
C.
Naked seeds
D.
Broad leaves
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Solution
Gymnosperms are known for having naked seeds, unlike angiosperms which have seeds enclosed in fruits.
Correct Answer:
C
— Naked seeds
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Q. Which of the following is a characteristic of monocots?
A.
Two seed leaves
B.
Parallel leaf venation
C.
Woody stems
D.
Taproot system
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Solution
Monocots are characterized by having parallel leaf venation and one seed leaf (cotyledon).
Correct Answer:
B
— Parallel leaf venation
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Q. Which of the following is a characteristic of monocotyledons?
A.
Two seed leaves
B.
Parallel leaf venation
C.
Woody stems
D.
Taproot system
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Solution
Monocotyledons, or monocots, typically have parallel leaf venation and one seed leaf.
Correct Answer:
B
— Parallel leaf venation
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Q. Which of the following is a feature of gymnosperms?
A.
Enclosed seeds
B.
Deciduous leaves
C.
Cones for reproduction
D.
Broad leaves
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Solution
Gymnosperms reproduce using cones, which contain their seeds.
Correct Answer:
C
— Cones for reproduction
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Q. Which of the following is a key feature of angiosperms?
A.
Vascular tissue
B.
Seeds
C.
Flowers
D.
All of the above
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Solution
Angiosperms are characterized by the presence of flowers, seeds, and vascular tissue.
Correct Answer:
D
— All of the above
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Q. Which of the following is a key feature of gymnosperms?
A.
Enclosed seeds
B.
Presence of flowers
C.
Naked seeds
D.
Non-vascular
Show solution
Solution
Gymnosperms are characterized by having naked seeds, not enclosed in fruits.
Correct Answer:
C
— Naked seeds
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Q. Which of the following is NOT a characteristic of angiosperms?
A.
Seeds enclosed in fruits
B.
Presence of flowers
C.
Vascular tissue
D.
Naked seeds
Show solution
Solution
Angiosperms have seeds enclosed in fruits, while naked seeds are characteristic of gymnosperms.
Correct Answer:
D
— Naked seeds
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