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The Berlin Wall fell on the 9th November 1989. The wall had been constructed in 1961, making it illegal for citizens to cross it from East Berlin to West Berlin for over twenty years. During these years, ...

The addition of excess nitrate to the freshwater body causes algal bloom on the surface, blocking sunlight. This reduces the photosynthetic activity of submerged plants, causing them to die. Subsequently,...

18 total2,8,8(2,8,7 in chlorine atom, one more from another atom to form the negative charge and filling the third shell)

Konrad Adenauer was chancellor from September 1949 to October 1963 a rule of 14 years longer than the whole of the Weimar republic or Adolf Hitler. Compared to Weimar’s 13 chancellors and Hitler’s u...

Since the sperm cell's role is to swim to the egg and fertilise it, it requires a tail for movement. The middle piece is full of mitochondria to provide energy so that the sperm cell can swim and reach th...