Biology GK · all questions

Plant Anatomy and Physiology
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Q261

It happens during the photosynthesis in green plants

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Q262

The regulators produced by plants, which are low in concentrations regulate plant physiological processes are known as

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Q263

The most common bacteria present in the organic effluents is

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Q264

Which among the following is a male part of a flower?

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Q265

Which of the following has the maximum efficiency to convert solar energy into chemical energy?

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Q266

All electrons possess the same intrinsic spin, which is characterized by a spin quantum number S, the magnitude of which is always

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Q267

In C₄ plants, initially the carbon dioxide of the atmosphere comes in contact with mesophyll cells where it combines with phosphoenol pyruvic acid to form

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Q268

Which micronutrient is supplied by soil to plant?

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Q269

Flowering of plants by exposure to low temperature is called

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Q270

There may be more than one embryo sac in an ovule due to which of the following reasons?

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Q271

Carbon dioxide diffuses directly from the atmosphere and is readily dissolved in water to result in

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Q272

The dark conversion of Pfr to the Pr form of phytochrome appears to be restricted to the

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Q273

If an unvemalized henbane plant is grafted to a Maryland Mammoth tobacco plant,

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Q274

At temperatures above absolute zero, all components of matter are in motion - that is, they possess a certain amount of

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Q275

Each chlorophyll has a fifth ring containing only

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Q276

In which of the following schizocarpic dry fruit types, the fruit is produced from a bicarpellary, syncarpous, bilocular and inferior ovary?

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Q277

Consider the following statements and choose the correct answer:
1. The grassland biome is found where rainfall is about 60 - 70 inches
2. Grasslands provide natural pasture for grazing animals and our principal agricultural food plants have been developed by artificial selection from the grasses
3. The birds characteristic of grasslands are prairie chickens, meadow larks and rodent hawks
4. The species of grasses present in any given grassland may range from tall species, 150 to 250 cm in height, to short species of grass that do not exceed 15 cm in height

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Q278

The rate of storage of organic matter or energy not used by heterotrophs in the community in a given time is known as

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Q279

The type of xerophilous plants which grow on saline soil with high concentration of salts like NaCI, MgCl₂ and MgSO₄ are known as

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Q280

When the variants of an enzyme are within the same species of an organism they are called

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