Both plants and animals carry on metabolism. From a metabolic point of view, which of the two are more complex? Include in your answer the following topics:

1. Cell structure
2. Biochemical pathways
3. Enzymes
4. Organic molecules
5. Autotrophy and heterotrophy

Do both plants and animals use the respiration biochemical pathway? Do both plants and animals use the photosynthesis biochemical pathway? Within which cellular organelle do respiration and photosynthesis occur? What kinds of enzymes are involved in photosynthesis and respiration? How are autotrophs and heterotrophs different? How do plants and animals get the organic molecules they need?