Question

based on what you have learned about photosynthesis, select the true statements.
the reactants of photosynthesis are made of different types of atoms than the products.
photosynthesis uses light energy to produce food molecules.
the chemical bonds between atoms change during photosynthesis.
food provides an organism with energy - rich molecules, which are broken down in cells.

Explanation:

1. For "The reactants of photosynthesis are made of different types of atoms than the products": This is false. Photosynthesis follows the law of conservation of mass, so reactants (CO₂ and H₂O) and products (C₆H₁₂O₆ and O₂) have the same types of atoms (C, H, O).
2. For "Photosynthesis uses light energy to produce food molecules": This is true. Photosynthesis in plants/certain organisms uses light energy to convert CO₂ and H₂O into glucose (food) and O₂.
3. For "The chemical bonds between atoms change during photosynthesis": This is true. Bonds in CO₂ and H₂O are broken, and new bonds in glucose and O₂ are formed.
4. For "Food provides an organism with energy - rich molecules, which are broken down in cells": This is true. Food (like glucose from photosynthesis or consumed) has energy - rich molecules (e.g., glucose) that are broken down (e.g., in cellular respiration) to release energy.

So the true statements are:

• Photosynthesis uses light energy to produce food molecules.
• The chemical bonds between atoms change during photosynthesis.
• Food provides an organism with energy - rich molecules, which are broken down in cells.

Answer:

• Photosynthesis uses light energy to produce food molecules.
• The chemical bonds between atoms change during photosynthesis.
• Food provides an organism with energy - rich molecules, which are broken down in cells.