The significance of meiosis is given below:-
(i) Formation of gametes – Meiosis forms gametes that are essential for sexual reproduction.
(ii) Genetic information – It switches on the genetic information for the development of gametes or gametophytes and switches off the sporophytic information.
(iii) Maintenance of chromosome number – Meiosis maintains the fixed number of chromosomes in sexually reproducing organisms by halving the same. It is essential since the chromosome number becomes double after fertilisation.
(iv) Assortment of chromosomes – In meiosis paternal and maternal chromosomes assort independently. It causes reshuffling of chromosomes and the traits controlled by them. The variations help the breeders in improving the races of useful plants and animals.
(v) Crossing over – It introduces new combination of traits or variations.
(vi) Mutations – Chromosomal and genomic mutations can take place by irregularities of meiotic divisions. Some of these mutations are useful to the organism and are perpetuated by natural selection.

Measures to reduce noise pollution:
 (i) Use of loudspeaker to be avoided.
 (ii) Should not talk too loudly or play TV/ music too loudly.
 (iii) Do not play music too loud while driving or use horn unnecessarily.

The decision to effect the Partition of Bengal was announced on 19 July 1905 by the Viceroy of India, Lord Curzon. The partition took place on 16 October 1905 and separated the largely Muslim eastern areas from the largely Hindu western areas. The Hindus of West Bengal who dominated Bengal's business and rural life complained that the division would make them a minority in a province that would incorporate the province of Bihar and Orissa.  Hindus were outraged at what they recognised as a "divide and rule" policy, where the colonisers turned the native population against itself in order to rule, even though Curzon stressed it would produce administrative efficiency. The partition animated the Muslims to form their own national organization on communal lines. Bengal was reunited by Lord Hardinge in 1911 in an effort to appease Bengali sentiment.
It was reunited for the following reasons:
1. Swadeshi movement riots protested against it.
2. Hindus thought the east Bengal would have their own courts and policies.