OXYGEN CONCENTRATION IN THE WATER OF A LAKE Hours of Durkness 06:00 08.00 10:00 12:00 14:00 16:00 18:00 20:00 22:00 24.00 02:00 04:00 06:00 Time of Day 3. 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. Oxygen Concentration (ppm)

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Modes of Nutrition

It is a biological process of providing or obtaining food that is necessary for growth and health. It includes many physiological processes - absorption, ingestion, assimilation, catabolism, excretion, etc. In biology, the science that deals with nutrition's physiological and chemical processes are called "nutritional science."