The answer is B. There was a variety of food available on island X but there were only large seeds and nuts on island Y.
Explanation:
Darwin studied the flora and fauna of Galapagos island. He found that there were many varieties of small black birds which differed mainly in the shape of beaks and feeding habits. These small birds were later called as Darwin finches. Darwin realized that all these finches evolved on the same island itself and developed different beaks based on feeding habits.
Since on island X there was variety of food available, birds evolved with different beaks, whereas, on island Y only single type of seeds were available giving no chance for any evolution to occur.
Explanation: If a cell is put into a hypertonic solution, water will leave the cell. When a cell is put into a hypotonic solution, water will enter the cell. And a cell in an isotonic solution water moves into and out of cell at the same time.
