What most likely causes the trends in oxygen concentration shown in the graph above?
- A The water becomes colder at night and thus holds more oxygen.
- B Respiration in most organisms increases at night.
- C More organisms are respiring at night than during the day.
- D Photosynthesis produces more oxygen than is consumed by respiration during the day.
Quiz Leaderboard
- Click "Create Mock Test" to start a quiz.
- Select categories and the number of questions, then click "Submit" to begin.
- After completing the quiz, enter your name and email, then click "Submit" to view your score.
- Your score is shown as a percentage (e.g., 5 correct out of 10 is 50%).
- The leaderboard displays your name, score percentage, and total questions answered.
