Biology GK · all questions

Plant Anatomy and Physiology
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Q661

Locial necrosis results in open wounds often sunken in stems and surrounded by living tissue which are known as

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Q662

Cuscuta is a

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Q663

Match List-I (Horizons of soil profile) with List-II (Contents) and select the correct answer:

List-I	List-II
a. O-horizon	1. Composed of fresh or partially decomposed organic material
b. A-horizon	2. Composed of weathered parent material
c. B-horizon	3. Composed of major organic matter, accumulated by the loss of clay, iron and aluminium
d. C-horizon	4. Composed of consolidated rock
e. R-horizon	5. Composed of alluvial concentration of all or any of the silicates, clay, iron, aluminium and humus, alone or in combination

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Q664

Plants with crassulacean acid metabolism (CAM plants) exhibit different stomatal behaviour in that

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Q665

Which of the following organelles of a cell is/are involved in photosynthesis?

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Q666

In the context of respiration, the stage known as glycolysis involves the breaking down of . . . . . . . . to pyruvic acid.

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Q667

Photosynthesis occurs in

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Q668

According to the Calvin-Benson cycle, the first product to accumulate during photosynthesis is

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Q669

According to Yoda and Kira (1963), the principles of population regulation include:

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Q670

The growth movements resulting from a difference between the rates of extension growth on opposite sides of an organ is called as

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Q671

The plants that are capable of fixing nitrogen directly from the atmosphere include

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Q672

Perfectly even flow, in which water particles move parallel to one another, is called

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Q673

North Indian upper alluvial savannah is also known as

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Q674

Which of the following imparts black stripes running down the rocks of some hills and indicates thereby the type of algal vegetation?

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Q675

An element present in Chlorophyll is

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Q676

Two guanosine triphosphate (GTP) molecules are generated in the Krebs cycle via the reaction

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Q677

When the diseased stem of sugarcane is splitted open during the early stages ofthe red-rot disease.

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Q678

Which of the following countries has the highest number of livestock in the world although their productivity is very poor?

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Q679

Consider the following statements regarding the germination of pollen grain and choose the correct answer:
1. The content of the pollen is a true male gametophyte
2. The pollen tube comes out due to the protrusion of the exine through the germ pore
3. When the pollen grain has germinated, the pollen tube penetrates the stigma through the stigmatic papillae
4. Some stigmas have a continuous cuticle in which pollen tubes penetrate by enzyme action

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Q680

Savannah forest of Burma is also known as

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