Given a scientific passage and an answer, generate a question for the given answer.

Q: Passage: Exocytosis describes the process of vesicles fusing with the plasma membrane and releasing their contents to the outside of the cell, as shown in Figure below . Exocytosis occurs when a cell produces substances for export, such as a protein, or when the cell is getting rid of a waste product or a toxin. Newly made membrane proteins and membrane lipids are moved to the plasma membrane by exocytosis. Answer: exocytosis

A: What describes the process of vesicles fusing with the plasma membrane and releasing their contents to the outside of the cell?
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Q: Passage: Pollination by Insects Bees are perhaps the most important pollinator of many garden plants and most commercial fruit trees (Figure 32.12). The most common species of bees are bumblebees and honeybees. Since bees cannot see the color red, bee-pollinated flowers usually have shades of blue, yellow, or other colors. Bees collect energy-rich pollen or nectar for their survival and energy. Answer: pollination

A: What important function do bees perform on garden plants and many commercial fruit trees?
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Q: Passage: Carbon is an element. Carbon is the basis of all life on Earth. Since carbon can combine with many other elements it forms a variety of different substances. Answer: carbon

A:
Which chemical element is the basis of all life on earth?
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