Question

select all the true statements about how plants use and change energy.
light energy is necessary to power photosynthesis.
plant cells create energy from carbon dioxide and water.
cellular respiration releases chemical energy from sugars.
plant cells use cellular respiration to transform light energy into chemical energy.

Explanation:

• Light energy is necessary to power photosynthesis: Photosynthesis is the process by which plants convert light energy (from the sun) into chemical energy. Chlorophyll in plant cells captures light energy, which is then used to convert carbon dioxide and water into glucose and oxygen.
• Plant cells create energy from carbon dioxide and water: Through photosynthesis, plants use carbon dioxide (\(CO_2\)) and water (\(H_2O\)) in the presence of light energy to produce glucose (\(C_6H_{12}O_6\)), a form of chemical energy, and oxygen (\(O_2\)). The chemical equation for photosynthesis is \(6CO_2 + 6H_2O+light energy

ightarrow C_6H_{12}O_6 + 6O_2\).

• Cellular respiration releases chemical energy from sugars: Cellular respiration is the process by which cells break down glucose (a sugar) to release energy. The chemical equation for cellular respiration is \(C_6H_{12}O_6+6O_2

ightarrow 6CO_2 + 6H_2O+energy\). The energy released is used for various cellular activities.

• Plant cells use cellular respiration to transform light energy into chemical energy: This statement is false. Plant cells use photosynthesis to transform light energy into chemical energy (in the form of glucose). Cellular respiration is the process of breaking down glucose (produced by photosynthesis) to release energy for the cell's use.

Answer:

• Light energy is necessary to power photosynthesis.
• Plant cells create energy from carbon dioxide and water.
• Cellular respiration releases chemical energy from sugars.