Questions

Black soils are rich in montmorillonitic and beidellitic group of clay minerals and are poor in nitrogen, phosphorus and organic matter. Black soils are most suitable for the cotton crop hence it is also known as black cotton soil. Besides cotton, the soil is suitable for the cultivation of crops like wheat, groundnut, chillies, tobacco and jowar.

Cerebrum is the largest region of the brain.

Paging is solution to external fragmentation problem which is to permit the logical address space of a process to be noncontiguous, thus allowing a process to be allocating physical memory wherever the latter is available.

DNA is not a single stranded and does not have amino acids. Hence options, b & C are eiminated. Dna is a double helix structure containing nucleobase—either cytosine (C), guanine (G), adenine (A), or thymine (T)—as well as a monosaccharide sugar called deoxyribose and a phosphate group. 

The digestion process starts in the mouth and the complete digestion process completes in the small intestine where all the nutrients in the food are absorbed.