Answer: C) 1990 Explanation: Internet service providers (ISP's) emerged in the late 1980's and early 1990's. The ARPANET was decommissioned in 1990. By 1995, the Internet was fully commercialized in the U.S., when the NSFNet was decommissioned, removing the last restrictions on use of the Internet to carry commercial traffic.

Answer: B) DNA Explanation: The nucleus of a cell contains chromosomes, which carry genetic information in a long molecule called DNA. Genes are regions of DNA that carry the code to control a particular cell activity or the production of a particular protein.

Answer: C) molecules of the dispersion medium colliding with dispersed phase particles Explanation: When their is a colloid in the solution, then it will show the Brownian movement, such as dust particle in the air will show the Brownian movement.   Hence, Brownian movement arises due to the impact of the molecules of the dispersion medium with the colloidal particles. It has been postulated that the impact of the molecules of dispersion medium on the colloidal particles are unequal.   This leads to the zig-zag (random) motion of the colloidal particles.

It is Darkness. If it is more darkness outside, we can see less in that.

Answer: D) 26 April Explanation: 26th April; Theme for the year 2017: "Innovation – Improving Lives".

Answer: B) Monotheism Explanation: Belief in the existence of one god, or in the oneness of God is called Monotheism.

Answer: D) Mitochondria Explanation: Mitochondria is the Organelle in which Cellular Respiration Occur.

Answer: C) 5040 Explanation: The number of ways in which the letters of the word RAILINGS can be arranged such that R & S always come together is   Count R & S as only 1 space or letter so that RS or SR can be arranged => 7! x 2!   But in the word RAILINGS, I repeated for 2 times => 7! x 2!/2! = 7! ways = 5040 ways.