Final answer:
Oxygen and carbon dioxide are the shared components in the middle of the model between the moose's cellular respiration and the lily pad's photosynthesis, representing the flow of matter and energy in an ecosystem.
Step-by-step explanation:
In the scenario described, the moose is consuming oxygen and nutrients to fuel its cellular respiration and produce carbon dioxide and water as byproducts. Meanwhile, the lily pad utilizes these byproducts in the process of photosynthesis, along with sunlight, to produce glucose and oxygen. Hence, the substances that should be placed in the middle as the shared components between the moose's cellular respiration and the lily pad's photosynthesis are oxygen and carbon dioxide.
Photosynthesis and cellular respiration are interconnected, where oxygen produced during photosynthesis is used in cellular respiration and carbon dioxide produced during cellular respiration is used in photosynthesis. This creates a cyclical relationship between the two processes, which is essential for the flow of matter and energy within an ecosystem.
Within a cell, both cellular respiration and photosynthesis are dependent on organelles, like mitochondria in cellular respiration and chloroplasts in photosynthesis. Both processes involve the transfer of energy, with molecules like ATP playing a crucial role in energy transfer within the cell.