Plant Anatomy and Physiology MCQs with Answers 2027

Q581

Carbon dioxide assimilation by green sulphur bacteria requires the presence of which of the following as a hydrogen source?

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Q582

Open question

Which one of the following agents does not contribute to propagation of plants through seed dispersal?

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Q583

Open question

The visible spectrum ranges from

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Q584

Open question

The largest single contribution of CO₂ is made by

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Q585

Open question

Which of the following enzymes is mainly responsible for reduction of molecular nitrogen?

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Q586

Open question

When the chloroplast pigments absorb light

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Q587

Open question

Match List-I (Diseases) with List-II (Causative agents) and select the correct answer:

List-I	List-II
a. Covered smut of Barley	1. Alternaria solani
b. Early blight of Potato	2. Ustilago hordei
c. Red rot of Sugarcane	3. Xanthomonas citri
d. Citrus canker	4. Colletotrichum falcatum

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Q588

Open question

Many species of plants are capable to survive and grow in low light intensity which are known as

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Q589

Open question

In black rust of wheat, the fine, hair-like hyphal threads seen interspersed between the periphyses that extend through the ostiole and project much beyond the periphyses are known as

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Q590

Open question

Which of the following normally occurs in radioactive fallout, has a half-life of 28 years and behaves like calcium in biogeochemical cycles?

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Q591

Open question

The severity of late blight infection is governed by environmental conditions which include

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Q592

Open question

When attacked by certain fungi and viruses, the floral organs such as stamens and carpels transform into leaf-like structures known as

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Q593

Open question

Which is true for glycolysis?

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Q594

Open question

Match List-I with List-II and select the correct answer:

List-I (Grafting types)	List-II (Processes)
a. Tongue or Whip grafting	1. Scions having wedge-shaped cut are grafted on the slits at the top of stock
b. Wedge grafting	2. A V-shaped notch is made on stock and a wedge-shaped cut is made on the scion
c. Side grafting	3. Both the stock and the scion are cut obliquely at about the same angle
d. Crown grafting	4. Single scion having wedge-shaped cut is inserted in a lateral slit of the stock

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Q595

Open question

Match List-I (Life-forms of plants in desert ecosystem) with List-II (Species characteristics) and select the correct answer:

List-I	List-II
a. Annuals	1. Species which remain dormant in the soil during dry period but are able to respond quickly to cool or wet periods
b. Desert shrubs	2. Species which store water in their water storage tissues
c. Succulents	3. Species mat avoid drought by growing in presence of adequate moisture
d. Microflora	4. Species with numerous branches arising from the basal part of the short stem and small thick leaves that may be shed during dry periods

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Q596

Open question

The causal organism for late blight of potato is

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Q597

Open question

Any method that renders the seed coat, permeable to water and oxygen or breaks the seed coat so that embryo expansion is not physically retarded, is known as

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Q598

Open question

In the temperate or upper hill zone where Darjeeing town and Ghum are located, which of the following associations is observed?

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Q599

Open question

Which of the following types of soil remains best for the growth of majority of plants?

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Q600

Open question

The primary characteristics of the tundra biome include

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