Q11. The process of photosynthesis primarily occurs in which part of the plant?
a) Stems
b) Roots
c) Leaves
d) Flowers
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Correct Answer: c) Leaves
Explanation: Chloroplasts, where photosynthesis occurs, are primarily found in the leaves of plants.
Q12. The waxy layer covering the aerial parts of plants is called:
a) Cuticle
b) Epidermis
c) Cortex
d) Stoma
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Correct Answer: a) Cuticle
Explanation: The cuticle is a protective waxy layer covering the epidermis of leaves and stems.
Q13. The process by which plants lose water vapor through small pores in their leaves is called:
a) Respiration
b) Transpiration
c) Osmosis
d) Absorption
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Correct Answer: b) Transpiration
Explanation: Transpiration is the process of water movement through a plant and its evaporation from aerial parts, such as leaves and stems.
Q14. Which of the following is not a primary function of plant roots?
a) Anchor the plant
b) Absorb water and nutrients
c) Conduct photosynthesis
d) Store food
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Correct Answer: c) Conduct photosynthesis
Explanation: Photosynthesis primarily occurs in the leaves of plants, not in the roots.
Q15. Which plant hormone promotes cell elongation and growth?
a) Auxin
b) Gibberellin
c) Cytokinin
d) Abscisic acid
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Correct Answer: a) Auxin
Explanation: Auxin promotes cell elongation and growth, especially in the apical meristems.
Q16. The process of pollen transfer from anther to stigma is called:
a) Fertilization
b) Pollination
c) Germination
d) Senescence
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Correct Answer: b) Pollination
Explanation: Pollination is the transfer of pollen grains from the male reproductive organs to the female reproductive organs of a flower.
Q17. The female reproductive organ of a flower is called the:
a) Anther
b) Ovary
c) Stamen
d) Filament
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Correct Answer: b) Ovary
Explanation: The ovary contains ovules, which develop into seeds upon fertilization.
Q18. Which of the following is a method of asexual reproduction in plants?
a) Budding
b) Pollination
c) Fertilization
d) Meiosis
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Correct Answer: a) Budding
Explanation: Budding involves the formation of a new individual from a bud or outgrowth on the parent organism.
Q19. What is the male reproductive organ of a flower called?
a) Stigma
b) Style
c) Anther
d) Ovule
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Correct Answer: c) Anther
Explanation: The anther is the part of the stamen that produces pollen grains.
Q20. The term “perennial” refers to plants that:
a) Complete their life cycle in one year
b) Flower only once in their lifetime
c) Live for more than two years
d) Produce flowers and fruits continuously
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Correct Answer: c) Live for more than two years
Explanation: Perennial plants live for more than two years and usually produce flowers and fruits repeatedly.