Question

question 3 of 25 a squirrel runs up a tree to escape a dog. which process gives the squirrel most of the energy it needs to escape? a. cellular respiration b. photosynthesis c. the calvin cycle d. the carbon cycle

Explanation:

• Option A: Cellular respiration is the process by which cells break down glucose (or other organic molecules) to release energy in the form of ATP, which is used by organisms (like the squirrel) for activities such as running.
• Option B: Photosynthesis is the process by which plants, algae, and some bacteria convert light energy into chemical energy (glucose). Squirrels are animals and do not perform photosynthesis.
• Option C: The Calvin cycle is a part of photosynthesis (specifically the light - independent reactions) that occurs in plants to fix carbon dioxide into glucose. Squirrels do not carry out the Calvin cycle.
• Option D: The carbon cycle is a biogeochemical cycle that describes the movement of carbon through the biosphere, atmosphere, hydrosphere, and geosphere. It is not a process that directly provides energy to an individual squirrel for its activities.

Answer:

A. Cellular respiration