Answer: B) B Explanation: The Secondary Structure of a Protein is option B)   The Secondary Structure of a Protein results from Hydrogen Bonds.

Answer: A) Succession Explanation: The process which wherein an Ecosystem may renew itself is known as Ecological Succession. The time scale may be decades or a million of years after a mass extinction.  It may be achieve over a period of time.

Answer: B) Neutron Explanation: In nuclear physics, nuclear fission is either a nuclear reaction or a radioactive decay process in which the nucleus of an atom splits into smaller parts (lighter nuclei). The fission process often produces free neutrons and releases a very large amount of energy.   Thus, The Nuclear Fission is caused by the impact of Neutrons.

Answer: C) cosx Explanation:   Thus, the derivative of sinx by first principle is cosx.

Answer: D) Oil Explanation: Here Oil is the most viscous liquid. The liquid with the most intermolecular force is high viscous. viscosity is how smoothly a liquid flows and how hardly the liquid flows it is highly viscous.

Mushroom.

Answer: C) fractional reserves Explanation: Most modern banking systems are based on Fractional reserves.   Fractional-reserve banking is the practice whereby a bank accepts deposits, makes loans or investments, but is required to hold reserves equal to only a fraction of its deposit liabilities. Reserves are held as currency in the bank, or as balances in the bank's accounts at the central bank. 1. In a fractional reserve banking system banks can create money through the lending process. 2. A fractional reserve banking system is susceptible to bank panics. 3. Bank panics are a risk of fractional reserve banking, but are unlikely when banks are highly regulated and lend prudently.

Answer: B) Elastic Explanation: A sponge is a porous material. Rubber is an elastic material.  Since Rubber is not a Massive or solid and not an inflexible thing, it is elastic.