Ans: Mitosis is a process where a single cell divides into two identical daughter cells (cell division). During mitosis one cell? divides once to form two identical cells. The major purpose of mitosis is for growth and to replace worn out cells.
Answer:
Option: c. Sewer
Explanation:
Sewer plays a key role in collecting wastewater from human populations more effectively than in the past. Before, the emergence of cities, there was no proper procedure to collect the wastewater in America, which ultimately affected the environment and underground water. As cities began to take shape in America with a larger population, the sewage system came in the late 1850s in Chicago and Brooklyn.
The issue of nuclear proliferation continues to raise concern from the world community regarding the nations of India, Iraq, Pakistan, and North Korea.
The spread of nuclear weapons is known as nuclear proliferation.
<span>The threat of nuclear proliferation is very serious business. Its is everywhere and as a global community we formed a treaty on the non proliferation of nuclear weapons.</span>
