MCQ 21:
The part of the plant that develops into fruit after fertilization is the:
A) Stamen
B) Ovule
C) Ovary
D) Petal
Answer: C) Ovary
Explanation: The ovary, after fertilization, develops into the fruit, which contains seeds.
MCQ 22:
Which of the following is a characteristic of algae?
A) They are vascular plants.
B) They can be unicellular or multicellular.
C) They have true roots and leaves.
D) They reproduce only sexually.
Answer: B) They can be unicellular or multicellular.
Explanation: Algae can be found in various forms, including unicellular and multicellular species, and do not have true roots, stems, or leaves.
MCQ 23:
Which part of the plant is primarily involved in photosynthesis?
A) Roots
B) Stem
C) Leaves
D) Flowers
Answer: C) Leaves
Explanation: Leaves contain chlorophyll and are the main sites for photosynthesis in plants.
MCQ 24:
Which hormone is involved in promoting seed dormancy?
A) Auxin
B) Gibberellin
C) Abscisic acid
D) Cytokinin
Answer: C) Abscisic acid
Explanation: Abscisic acid is responsible for promoting seed dormancy and stress responses in plants.
MCQ 25:
Which group of plants is characterized by having true roots, stems, and leaves?
A) Bryophytes
B) Pteridophytes
C) Gymnosperms
D) Angiosperms
Answer: B) Pteridophytes
Explanation: Pteridophytes (ferns) have true roots, stems, and leaves, unlike bryophytes, which lack vascular tissues.
MCQ 26:
What is the function of the cuticle on plant leaves?
A) Nutrient absorption
B) Water retention
C) Photosynthesis
D) Respiration
Answer: B) Water retention
Explanation: The cuticle is a waxy layer on the surface of leaves that helps prevent water loss by reducing evaporation.
MCQ 27:
Which of the following plant structures is responsible for the production of seeds?
A) Leaf
B) Flower
C) Stem
D) Root
Answer: B) Flower
Explanation: Flowers are the reproductive structures of angiosperms and are responsible for the production of seeds after fertilization.
MCQ 28:
Which type of fungi forms symbiotic associations with plant roots?
A) Yeasts
B) Mycorrhizae
C) Mold
D) Mushrooms
Answer: B) Mycorrhizae
Explanation: Mycorrhizal fungi form beneficial associations with plant roots, enhancing nutrient absorption, especially phosphorus.
MCQ 29:
What is the function of the phloem in plants?
A) Transport water
B) Transport nutrients and sugars
C) Provide structural support
D) Conduct photosynthesis
Answer: B) Transport nutrients and sugars
Explanation: Phloem is responsible for transporting organic compounds, particularly sugars produced during photosynthesis, throughout the plant.
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