Biology
Plant Transport and Physiology
2,012 Questions
Access a comprehensive set of questions on plant transport mechanisms and physiological adaptations. Topics include water movement, translocation of food, and plant responses to external stimuli. These biology questions are essential for medical entrance exams and other science competitive tests.
Xylem and phloem transportTranspiration and evaporationPlant adaptationsGeotropic and phototropic responsesWater absorption by rootsRespiration in roots
Plant Transport and Physiology Questions
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...their own food using sunlight
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...transported inside plants
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...from the soil and from air
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...and release carbon dioxide
A
Correct answer
Explanation
Plants are autotrophic organisms, meaning they produce their own food (sugars) using light energy from the sun during photosynthesis.
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...their own food using sunlight
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...transported inside plants
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...from the soil and from air
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...and release carbon dioxide
C
Correct answer
Explanation
Plants absorb water and mineral salts from the soil through their roots, and they take in gases like carbon dioxide and oxygen from the air through their leaves.
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light
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temperatures
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water
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air
B
Correct answer
Explanation
While plants require light, water, and air, most plant species thrive best in mild temperatures. Extreme heat or freezing cold can disrupt their metabolic processes and damage their tissues.
D
Correct answer
Explanation
Iron (Fe) deficiency symptoms in plants often manifest similarly to Manganese (Mn) deficiency, typically appearing as interveinal chlorosis in younger leaves due to the low mobility of these micronutrients within the plant.
A
Correct answer
Explanation
Heart rot of beets and cracking in celery are classic symptoms of Boron (B) deficiency. Boron is essential for cell wall integrity and structural development in these crops.
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Chronic deficiency
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Acute deficiency
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Both
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None
A
Correct answer
Explanation
Chronic deficiency occurs when a nutrient is supplied at a rate that is consistently lower than the plant's requirements over a long period, leading to slow growth and persistent symptoms.
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Chronic deficiency
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Acute deficiency
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Both
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None
B
Correct answer
Explanation
Acute deficiency is characterized by a sudden onset of symptoms when a nutrient becomes unavailable, often during a period of rapid plant growth when demand is high.
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Asparagine & Glutamine
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Glutamine and Glycine
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Glycine and Histidine
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All
A
Correct answer
Explanation
Asparagine and glutamine are the two primary amides used by plants for nitrogen transport and storage.
A
Correct answer
Explanation
Mineral salts are absorbed by roots and translocated to other parts of the plant through the xylem vessels.
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In Apoplast water absorption is passive
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In symplast water absorption is active
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Both
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None
D
Correct answer
Explanation
Excess manganese (Mn) competes with iron (Fe), magnesium (Mg), and calcium (Ca) for uptake, often inducing deficiencies in these elements.
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Chlorosis & Necrosis
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Stunted plant growth, Premature fal of leaves and buds
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Inhibition of cell division
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All
D
Correct answer
Explanation
Plant deficiency symptoms are diverse and include chlorosis (yellowing), necrosis (tissue death), stunted growth, premature leaf fall, and inhibition of cell division. All these are recognized symptoms of nutrient deficiency.
A
Correct answer
Explanation
The critical concentration is defined as the concentration of an essential element in plant tissue below which the growth of the plant is retarded. This is a standard concept in plant mineral nutrition.
D
Correct answer
Explanation
Little leaf of brinjal (eggplant) is a classic symptom of zinc deficiency in plants.