What are the answers to study guide Chapter 8 section 1 how organisms obtain energy?

In Chapter 8, Section 1, organisms obtain energy primarily through two processes: photosynthesis and cellular respiration. Autotrophs, such as plants, convert sunlight into chemical energy via photosynthesis, while heterotrophs, including animals, gain energy by consuming organic matter. Both processes involve the transformation of energy to fuel cellular activities, with photosynthesis producing glucose and oxygen, and cellular respiration breaking down glucose to release energy. The interplay between these processes sustains life on Earth by cycling energy through ecosystems.