Plant Physiology MCQs-13

Plant Physiology MCQs-13
Multiple Choice Questions (MCQs)
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1. The amount of radiant energy from light received per unit area by plants, influencing photosynthesis and growth, is referred to as ____________

 Light quality

 Light intensity

 Radiation index

 Photoperiod

2. Base temperature in plant science refers to_________

 Temperature for maximum photosynthesis

 Temperature below which plant growth stops

 Maximum temperature tolerance

 Optimum temperature for flowering

3. _________ are aquatic plants that have adapted to life in water, capable of developing structures that facilitate nutrient absorption for growth and metabolic processes

 Heliophytes

 Sciophytes

 Hydrophytes

 Xerophytes

4. Which region of the electromagnetic spectrum is most effective for photosynthesis?

 Blue and red light

 Green light

 Infrared light

 Yellow light

5. _______________ is considered a foundational abiotic factor essential for sustaining life on Earth

 Light

 Atmospheric pressure

 Wind

 Soil nutrients

6. Which spectral region strongly stimulates plant elongation?

 Far-red radiation

 Blue light

 Green light

 Ultraviolet

7. Radiation with wavelengths less than 280 nm has what effect on plants?

 Stimulates germination

 Promotes flowering

 Lethal effect

 Increases photosynthesis

8. Thermal energy exchange between organisms and their surrounding environment occurs primarily through which mechanisms?

 Translocation

 Radiation, conduction, convection, and evaporation

 Osmosis

 Diffusion only

9. Plants that initiate flowering when the night length exceeds a critical duration are classified as ________

 Day-neutral plants

 Short-day plants

 Long-day plants

 Facultative plants

10. Which property of light describes its wavelength or spectral composition (color) that influences plant physiological responses?

 Light quality

 Light distribution

 Light intensity

 Light duration

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Plant Physiology MCQs-13

Plant Physiology MCQs

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Multiple Choice Questions (MCQs) for Professional Test Preparation

Use of Multiple-choice questions (MCQs) is among the proven strategies to test your knowledge and improve your skills for relevant exams. These Expert-Approved MCQs cover various aspects of the fundamentals of agriculture, crop plants, production technologies, dietary and nutritional importance and industrial processes. Moreover, key questions about soil, irrigation, pests, diseases and other aspects of crop management are also included. Return to [MCQ Homepage]

Other Multiple Choice Questions (MCQ) Tests for Professional Exam Preparation

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[General Knowledge MCQs]	[Botany MCQs]	[Zoology MCQs]
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Plant Physiology MCQs

Plant physiology is the branch of botany focused on how plants function at cellular, biochemical, and organismal levels. It investigates crucial processes—photosynthesis, nutrient uptake, respiration, hormone action, and water transport—essential for plant growth, development, and environmental adaptation.

Key areas within the study of plant physiology include

1. Photosynthesis
2. Respiration
3. Transpiration
4. Water and mineral uptake
5. Transport (xylem and phloem)
6. Growth and development
7. Hormonal regulation
8. Nutrient assimilation
9. Stress physiology
10. Reproductive physiology

Photosynthesis: Plants capture light energy to convert carbon dioxide and water into glucose for energy,.
Water and Nutrient Transport: The xylem moves water upward from roots, while phloem transports nutrients throughout the plant.
Growth and Development: Study of how phytohormones regulate growth, seed germination, and response to environmental stressors like heat or drought.
Environmental Physiology: Understanding how plants adapt to their environment, such as managing water loss through stomatal closing

Plant Physiology MCQs, Photosynthesis MCQs, Nutrient Uptake MCQs, Transpiration and Respiration MCQs, Plant Growth Regulators