Answers IL-Science 7 A Cell Cycle — Unit testQuestion 4

4

QuizMultiple Choice

Cell Cycle — Unit test

Question 4 • IL-Science 7 A

Which best describes two ways in which hydrogen is involved in photosynthesis?

Answer

A

1 - Hydrogen is stored in leaves of plants.2 - Hydrogen combines with carbon dioxide to make glucose.

B

1 - Hydrogen is stored in leaves of plants.2 - Hydrogen combines with oxygen to make water.

C

1 - Hydrogen enters plants as a component of water.2 - Hydrogen combines with carbon dioxide to make glucose.

D

1 - Hydrogen enters plants as a component of water.2 - Hydrogen combines with oxygen to make carbon dioxide.

Explanation

Plants take in water, and hydrogen is one of the elements in water. During photosynthesis, that hydrogen helps combine with carbon dioxide to form glucose. Hydrogen is not stored in leaves as described in choices A and B, and combining hydrogen with oxygen makes water—not carbon dioxide.

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