Plant Growth and Development - Applications
Q. What is the main function of chlorophyll in plants?
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A.
Water absorption
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B.
Nutrient transport
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C.
Light absorption
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D.
Gas exchange
Solution
Chlorophyll's main function is to absorb light energy for photosynthesis.
Correct Answer: C — Light absorption
Q. What is the main function of root hairs?
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A.
Photosynthesis
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B.
Nutrient absorption
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C.
Support
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D.
Storage
Solution
Root hairs increase the surface area for water and nutrient absorption from the soil.
Correct Answer: B — Nutrient absorption
Q. What is the main function of stomata in plant leaves?
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A.
Nutrient absorption
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B.
Gas exchange
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C.
Water storage
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D.
Photosynthesis
Solution
Stomata are small openings that facilitate gas exchange, allowing CO2 in and O2 out.
Correct Answer: B — Gas exchange
Q. What is the main function of stomata in plants?
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A.
Nutrient absorption
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B.
Gas exchange
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C.
Water storage
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D.
Support
Solution
Stomata facilitate gas exchange, allowing CO2 in and O2 out.
Correct Answer: B — Gas exchange
Q. What is the main function of the phloem in vascular plants?
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A.
Transport water
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B.
Transport nutrients
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C.
Transport sugars
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D.
Support structure
Solution
Phloem is responsible for transporting sugars produced during photosynthesis throughout the plant.
Correct Answer: C — Transport sugars
Q. What is the main purpose of plant tropisms?
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A.
Reproduction
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B.
Growth direction
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C.
Nutrient uptake
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D.
Water conservation
Solution
Tropisms are growth responses that direct plants towards or away from environmental stimuli.
Correct Answer: B — Growth direction
Q. What is the primary purpose of plant secondary metabolites?
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A.
Photosynthesis
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B.
Defense mechanisms
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C.
Water absorption
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D.
Growth promotion
Solution
Secondary metabolites serve as defense mechanisms against herbivores and pathogens.
Correct Answer: B — Defense mechanisms
Q. What is the primary purpose of plant tropisms?
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A.
Reproduction
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B.
Growth direction
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C.
Nutrient absorption
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D.
Water storage
Solution
Tropisms are growth responses that direct plant growth towards or away from environmental stimuli.
Correct Answer: B — Growth direction
Q. What is the role of auxins in apical dominance?
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A.
Promote lateral bud growth
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B.
Inhibit lateral bud growth
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C.
Stimulate root growth
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D.
Enhance leaf growth
Solution
Auxins inhibit the growth of lateral buds, maintaining apical dominance in plants.
Correct Answer: B — Inhibit lateral bud growth
Q. What is the significance of mycorrhizal associations in plant growth?
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A.
Increase in photosynthesis
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B.
Enhanced nutrient uptake
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C.
Reduction of transpiration
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D.
Promotion of flowering
Solution
Mycorrhizal associations enhance nutrient uptake, particularly phosphorus, benefiting plant growth.
Correct Answer: B — Enhanced nutrient uptake
Q. What is the significance of the apical meristem in plants?
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A.
Root growth
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B.
Leaf development
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C.
Stem elongation
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D.
All of the above
Solution
The apical meristem is responsible for growth in length, contributing to root, stem, and leaf development.
Correct Answer: D — All of the above
Q. What is the term for the growth response of plants to gravity?
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A.
Phototropism
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B.
Gravitropism
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C.
Thigmotropism
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D.
Hydrotropism
Solution
Gravitropism is the growth response of plants to the direction of gravity.
Correct Answer: B — Gravitropism
Q. What is the term for the process by which plants lose water vapor to the atmosphere?
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A.
Transpiration
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B.
Photosynthesis
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C.
Respiration
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D.
Germination
Solution
Transpiration is the process of water vapor loss from plant surfaces, primarily through stomata.
Correct Answer: A — Transpiration
Q. What is the term for the process by which plants lose water vapor?
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A.
Transpiration
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B.
Respiration
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C.
Photosynthesis
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D.
Germination
Solution
Transpiration is the process of water vapor loss from plant surfaces, mainly through stomata.
Correct Answer: A — Transpiration
Q. What is the term for the process by which plants produce their own food using sunlight?
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A.
Respiration
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B.
Photosynthesis
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C.
Fermentation
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D.
Transpiration
Solution
Photosynthesis is the process by which plants convert sunlight into chemical energy.
Correct Answer: B — Photosynthesis
Q. What is the term for the process by which plants respond to light direction?
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A.
Phototropism
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B.
Gravitropism
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C.
Thigmotropism
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D.
Hydrotropism
Solution
Phototropism is the growth response of plants to light direction.
Correct Answer: A — Phototropism
Q. What is the term for the process by which plants respond to light?
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A.
Phototropism
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B.
Gravitropism
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C.
Thigmotropism
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D.
Hydrotropism
Solution
Phototropism is the growth response of plants to light direction.
Correct Answer: A — Phototropism
Q. What is the term for the process by which seeds develop into new plants?
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A.
Germination
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B.
Pollination
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C.
Fertilization
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D.
Photosynthesis
Solution
Germination is the process by which seeds develop into new plants under suitable conditions.
Correct Answer: A — Germination
Q. What is the term for the symbiotic relationship between plants and nitrogen-fixing bacteria?
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A.
Mutualism
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B.
Commensalism
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C.
Parasitism
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D.
Competition
Solution
The relationship between plants and nitrogen-fixing bacteria is a mutualistic symbiosis.
Correct Answer: A — Mutualism
Q. Which part of the plant is primarily responsible for nutrient transport?
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A.
Xylem
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B.
Phloem
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C.
Cortex
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D.
Pith
Solution
Phloem is responsible for the transport of nutrients and sugars throughout the plant.
Correct Answer: B — Phloem
Q. Which part of the plant is primarily responsible for water absorption?
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A.
Leaves
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B.
Stems
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C.
Roots
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D.
Flowers
Solution
Roots are primarily responsible for water absorption and nutrient uptake from the soil.
Correct Answer: C — Roots
Q. Which plant hormone is involved in fruit ripening?
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A.
Auxins
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B.
Gibberellins
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C.
Ethylene
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D.
Cytokinins
Solution
Ethylene is the hormone that regulates the ripening of fruits.
Correct Answer: C — Ethylene
Q. Which plant hormone is involved in the regulation of fruit ripening?
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A.
Auxins
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B.
Gibberellins
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C.
Ethylene
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D.
Cytokinins
Solution
Ethylene is the hormone that regulates the ripening of fruits, promoting changes in color and texture.
Correct Answer: C — Ethylene
Q. Which plant hormone is involved in the ripening of fruits?
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A.
Auxins
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B.
Gibberellins
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C.
Ethylene
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D.
Cytokinins
Solution
Ethylene is the hormone that regulates the ripening process in fruits, influencing color and texture changes.
Correct Answer: C — Ethylene
Q. Which plant hormone is primarily involved in fruit ripening?
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A.
Auxins
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B.
Gibberellins
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C.
Ethylene
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D.
Cytokinins
Solution
Ethylene is the hormone that plays a key role in the ripening of fruits.
Correct Answer: C — Ethylene
Q. Which plant structure is primarily involved in photosynthesis?
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A.
Roots
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B.
Stems
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C.
Leaves
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D.
Flowers
Solution
Leaves are the primary structures involved in photosynthesis, containing chlorophyll for light absorption.
Correct Answer: C — Leaves
Q. Which plant structure is primarily involved in reproduction?
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A.
Roots
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B.
Leaves
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C.
Flowers
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D.
Stems
Solution
Flowers are the reproductive structures of angiosperms, facilitating pollination and seed formation.
Correct Answer: C — Flowers
Q. Which plant structure is primarily responsible for photosynthesis?
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A.
Roots
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B.
Stems
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C.
Leaves
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D.
Flowers
Solution
Leaves are the primary structures where photosynthesis occurs, containing chlorophyll.
Correct Answer: C — Leaves
Q. Which process describes the growth of a plant towards light?
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A.
Phototropism
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B.
Gravitropism
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C.
Thigmotropism
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D.
Hydrotropism
Solution
Phototropism is the growth of a plant towards light, driven by differential growth rates.
Correct Answer: A — Phototropism
Q. Which type of plant growth is characterized by the increase in girth?
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A.
Primary growth
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B.
Secondary growth
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C.
Tertiary growth
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D.
Lateral growth
Solution
Secondary growth refers to the increase in girth of stems and roots, primarily in woody plants.
Correct Answer: B — Secondary growth
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