Explanation

DAP (Diammonium Phosphate) is a synthetic chemical fertilizer rich in nitrogen and phosphorus.

Manures and compost are natural fertilizers, not synthetic.

Explanation

Most organic compounds are non-polar, so they dissolve in non-polar solvents like ether, petroleum, and benzene.

Water is polar, so organic compounds are generally insoluble in it.

Explanation

Animal charcoal (activated charcoal) is used to remove color from solutions, especially in sugar refining.

It works by adsorbing colored impurities effectively.

Explanation

The kidney is the primary excretory organ in fishes, responsible for osmoregulation and excretion of nitrogenous wastes.

However, gills and skin also play minor roles in excretion.

Explanation

The Thar Desert is the main desert ecosystem in Sindh, extending into Rajasthan (India).

It is characterized by arid climate, sand dunes, and sparse vegetation.

Explanation

An enzyme is a biological catalyst and is almost always a protein.

Enzymes are organic catalysts. 

A large protein enzyme molecule is composed of one or more amino acid chains called polypeptide chains. 

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Explanation

Bile is produced by the liver.

It plays a key role in breaking down (emulsifying) fats for digestion.

The gall bladder stores and releases bile.

Explanation

Bone is the hardest and most rigid connective tissue in the body.

It provides structural support and protection to organs.

Explanation

The study of viruses is called virology.

Virology encompasses the study of viruses, their structure, classification, evolution, and how they interact with living organisms.

Explanation