Use the Following Information to Answer the Question(s) Below

question 52

Multiple Choice

Use the following information to answer the question(s) below.
A spaceship is designed to support animal life for a multiyear voyage to the outer planets of the solar system. Plants will be grown to provide oxygen and to recycle carbon dioxide. Since the spaceship will be too far from the Sun for photosynthesis, an artificial light source will be needed.
-What would be the expected effect on plants if the atmospheric CO2 concentration was doubled?

• A) All plants would experience increased rates of photosynthesis.
• B) C3 plants would have faster growth; C4 plants would be minimally affected.
• C) C4 plants would have faster growth; C3 plants would be minimally affected.
• D) C3 plants would have faster growth; C4 plants would have slower growth.
• E) Plant growth would not be affected because atmospheric CO2 concentrations are never limiting for plant growth.

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