Living Foraminiferans Have Been Found at the Deepest Depth of the World's

question 99

Multiple Choice

Living foraminiferans have been found at the deepest depth of the world's oceans-10,896 m down in the Western Pacific's Challenger Deep.What explains why foraminiferans cannot secrete normal shells at these depths?

• A) There is insufficient sunlight for photosynthesis.
• B) There is insufficient calcium carbonate in the surrounding water.
• C) It is too deep for coral animals.
• D) There is insufficient silica in the surrounding water.
• E) There is not enough organic matter to scavenge as an energy source for foraminiferans to build their shells.

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