Mikhail Gorbachev resigned as president of Soviet Union in December 1991 because the U.S.S.R. was dissolved in December 1991. He was the President of the Soviet Union from March 15, 1990 until December 25, 1991. The correct answer is A.
Answer: It is considered the "Plastron". What your referring to it is a tough layer of skin on the back of the turtle.
Explanation:
There used to be one big Continent called Pangea, He believed that over the course of the years that the plates shifted so much that the big mass separated, the evidence they used to support this was species evolution, fossils and sediment transfer
Photosynthesis. Photosynthesis occurs in the chloroplast, which contains the light absorbing pigment chlorophyll that is responsible for making plants green in colour.