You can have as many controls as necessary, But they must remain equal at all times in order to get the most accurate results
The amount of liquid is measured in L. As the unit Lm is only used when measuring the mass liquid fraction.
Answer:
Photosynthesis converts carbon dioxide and water into oxygen and glucose. Glucose is used as food by the plant and oxygen is a by-product. Cellular respiration converts oxygen and glucose into water and carbon dioxide. Water and carbon dioxide are by- products and ATP is energy that is transformed from the process.