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Class 9 Biology · Chapter 9 · Test 5

Gas Exchange and Excretion

25 MCQs • Practice gaseous exchange, excretion of plant wastes, guttation, and adaptations of mesophytes, hydrophytes, xerophytes, and halophytes.

MCQs

25 questions · 20 min · 25 marks

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Sample questions

The first 5 of 25. Try each one, then tap to see the answer.

  1. Question 1

    During daytime green parts of plants carry out which two processes?

    • APhotosynthesis and cellular respiration
    • BOnly photosynthesis
    • COnly cellular respiration
    • DOnly transpiration
    Show answer

    Answer: A

    During daytime plant cells carry out cellular respiration while green parts are also carrying out photosynthesis.

  2. Question 2

    During photosynthesis plants take in which gas from the environment?

    • ACarbon dioxide
    • BOxygen
    • CNitrogen
    • DHydrogen
    Show answer

    Answer: A

    During photosynthesis plants take in carbon dioxide from the environment.

  3. Question 3

    During photosynthesis plants release which gas?

    • AOxygen
    • BCarbon dioxide
    • CNitrogen
    • DHydrogen
    Show answer

    Answer: A

    During photosynthesis plants release oxygen.

  4. Question 4

    During respiration plants use which gas?

    • AOxygen
    • BCarbon dioxide
    • CNitrogen
    • DHydrogen
    Show answer

    Answer: A

    The text states that in respiration plants use oxygen.

  5. Question 5

    During respiration plants release which gas to the environment?

    • ACarbon dioxide
    • BOxygen
    • CNitrogen
    • DHydrogen
    Show answer

    Answer: A

    Plants release carbon dioxide to the environment during respiration.

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