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Cellular respiration is an exothermic reaction and photosynthesis is an endothermic reaction. How does the required activation energy compare for these two reactions?(1 point)%0D%0AResponses%0D%0A%0D%0ACellular respiration needs a smaller amount of energy to activate the reaction because the products are at a lower energy state than the reactants.%0D%0ACellular respiration needs a smaller amount of energy to activate the reaction because the products are at a lower energy state than the reactants.%0D%0A%0D%0APhotosynthesis needs a smaller amount of energy to activate the reaction because the products are at a lower energy state than the reactants.%0D%0APhotosynthesis needs a smaller amount of energy to activate the reaction because the products are at a lower energy state than the reactants.%0D%0A%0D%0APhotosynthesis needs a higher amount of energy to activate the reaction because the products are at a lower energy state than the reactants.%0D%0APhotosynthesis needs a higher amount of energy to activate the reaction because the products are at a lower energy state than the reactants.%0D%0A%0D%0ACellular respiration needs a higher amount of energy to activate the reaction because the products are at a lower energy state than the reactants.

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The correct response is:

Cellular respiration needs a smaller amount of energy to activate the reaction because the products are at a lower energy state than the reactants.

Cellular respiration is an exothermic reaction, which means it releases energy as it proceeds. The products (like carbon dioxide and water) are at a lower energy state compared to the reactants (like glucose and oxygen). This generally implies that the activation energy required to initiate the reaction is relatively small, as the energy "barrier" to overcome is less significant when the products are more stable (lower energy).

In contrast, photosynthesis is an endothermic reaction, absorbing energy (usually from sunlight) to convert carbon dioxide and water into glucose and oxygen, which are at a higher energy state. Therefore, photosynthesis typically requires a higher activation energy to reach the state where the reaction can proceed.