Question

matter continuously cycles through an ecosystem. a simplified carbon cycle is depicted below.

a. **identify process a. identify process b. provide evidence for your answers using the image above.

b. **explain the relationship between process a and process b.

Explanation:

For Part A:

Process A converts inorganic carbon ($\text{CO}_2$) into organic important biomolecules, which matches the core function of photosynthesis performed by producers like plants. Process B converts organic biomolecules back into $\text{CO}_2$, which is the key outcome of cellular respiration carried out by most living organisms.

For Part B:

The two processes form a complementary cycle: the end product of Process A (organic biomolecules) is the starting material for Process B, and the end product of Process B ($\text{CO}_2$) is the starting material for Process A. This cycle recycles carbon through the ecosystem.

Answer:

A. Process A: Photosynthesis. Evidence: It converts $\text{CO}_2$ (inorganic carbon) into organic important biomolecules.
Process B: Cellular Respiration. Evidence: It breaks down organic important biomolecules to release $\text{CO}_2$.
B. Process A and Process B are complementary and form a closed carbon cycle. The organic molecules produced by photosynthesis (Process A) are used as energy sources for cellular respiration (Process B), which releases the $\text{CO}_2$ needed to fuel photosynthesis again, cycling carbon continuously through the ecosystem.