MCQ 51:
What is the main function of the plant cuticle?
A) To facilitate photosynthesis
B) To prevent water loss
C) To support the plant structure
D) To absorb nutrients
Answer: B) To prevent water loss
Explanation: The cuticle is a waxy layer on leaves that reduces water loss, helping the plant conserve moisture.
MCQ 52:
Which group of plants is considered to be the most primitive?
A) Gymnosperms
B) Angiosperms
C) Bryophytes
D) Pteridophytes
Answer: C) Bryophytes
Explanation: Bryophytes, such as mosses and liverworts, are considered the most primitive group of land plants, lacking vascular tissues.
MCQ 53:
Which type of plant has the ability to float on water?
A) Xerophytes
B) Hydrophytes
C) Mesophytes
D) Halophytes
Answer: B) Hydrophytes
Explanation: Hydrophytes are plants adapted to live in aquatic environments and can float on water.
MCQ 54:
What is the role of auxins in plant growth?
A) Promote fruit ripening
B) Stimulate root growth
C) Induce leaf fall
D) Control flowering
Answer: B) Stimulate root growth
Explanation: Auxins promote root development and elongation, playing a critical role in plant growth and response to light and gravity.
MCQ 55:
In flowering plants, what structure develops into a seed?
A) Ovule
B) Stamen
C) Pistil
D) Anther
Answer: A) Ovule
Explanation: The ovule, upon fertilization, develops into a seed containing the plant embryo.
MCQ 56:
Which part of the plant is primarily responsible for the transportation of food?
A) Xylem
B) Phloem
C) Cambium
D) Cortex
Answer: B) Phloem
Explanation: Phloem is responsible for transporting sugars and other organic compounds throughout the plant.
MCQ 57:
Which of the following plants is known for its ability to thrive in low-nutrient conditions?
A) Cacti
B) Carnivorous plants
C) Ferns
D) Trees
Answer: B) Carnivorous plants
Explanation: Carnivorous plants, like Venus flytraps, obtain nutrients by capturing and digesting insects, allowing them to thrive in nutrient-poor environments.
MCQ 58:
Which of the following is NOT a characteristic of gymnosperms?
A) Seeds are exposed.
B) They have vascular tissues.
C) They produce flowers.
D) They can be woody.
Answer: C) They produce flowers.
Explanation: Gymnosperms do not produce flowers; they bear seeds on cones.
MCQ 59:
Which type of fruit develops from a single flower with multiple ovaries?
A) Simple fruit
B) Aggregate fruit
C) Multiple fruit
D) Accessory fruit
Answer: B) Aggregate fruit
Explanation: Aggregate fruits develop from a single flower that has multiple ovaries, such as raspberries.
MCQ 60:
What is the primary function of root hairs?
A) Store carbohydrates
B) Absorb water and nutrients
C) Support the plant
D) Conduct photosynthesis
Answer: B) Absorb water and nutrients
Explanation: Root hairs increase the surface area of roots, enhancing their ability to absorb water and nutrients from the soil.
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