Question

select all the true statements about how plants use and change energy.
photosynthesis creates energy from carbon dioxide and water.
plant cells use cellular respiration to get chemical energy from food.
photosynthesis transforms light energy into chemical energy.
chlorophyll captures light energy.

Explanation:

• Statement 1: Photosynthesis does not create energy. Energy cannot be created or destroyed (Law of Conservation of Energy). It transforms light energy into chemical energy. So this statement is false.
• Statement 2: Plant cells perform cellular respiration. In cellular respiration, glucose (a form of food - chemical energy stored in its bonds) is broken down in the presence of oxygen to release ATP (adenosine triphosphate), a form of chemical energy that cells can use. So this statement is true.
• Statement 3: Photosynthesis is the process where light energy (from the sun) is used to convert carbon dioxide and water into glucose (a chemical energy - rich molecule) and oxygen. So, it transforms light energy into chemical energy. This statement is true.
• Statement 4: Chlorophyll (a pigment in the chloroplasts of plant cells) absorbs light energy (especially in the red and blue regions of the electromagnetic spectrum). This absorbed light energy is used to power the light - dependent reactions of photosynthesis. So this statement is true.

Answer:

• B. Plant cells use cellular respiration to get chemical energy from food.
• C. Photosynthesis transforms light energy into chemical energy.
• D. Chlorophyll captures light energy.