Cyanide poisoning causes death in seconds because

• it causes lysis of red blood cells

• it denatures enzymes of the heart/muscle

• it breaks the electron transport chain

• it causes cardiac arrest

Total interacting animals and plants in any well-defined area is known as

• population

• biome

• community

• species

When one gene pair hides the effect of the other unit. The phenomenon is referred to as

• mutation

• epistasis

• dominance

• None of the above

In the grasslands, trees do not replace the grasses as a part of an ecological succession because

• water limits and fire

• limited sunlight and paucity of nutrients

• insect and fungi

• None of the above

Rubber is a product of

• fibre

• latex

• resin

• gum

The maximum fixation of solar energy is done by

• green plants

• fungi

• bacteria

• protozoa

A contemporary of Charles Darwin, who came to the same conclusion in the matter of organic evolution was

• Jean Baptist Lamarck

• Thomas Huxley

• Alfred Russel Wallace

• Franklin Benjamin

Xenobiotics which are inherently resistant to microbial attack are called as

• Persistent

• Recalcitrant

• Biodegradable

• All of these

The most healthy edible oil for heart is

• Butter oil

• Olive oil

• Rape-seed oil

• Mustard oil

Molybdenum deficiency

• All of the given options

• nitrate reductase

• nitrogenase

• chlorate reductase