Question

a student is setting up a model to study the carbon cycle and natural sources of carbon dioxide. they create a microenvironment that contains soil, leaf debris, an earthworm, heterotrophic bacteria, and a sun lamp. what natural source of carbon dioxide and major metabolic process was left out of the model? a there is no representation of decomposition in the model environment. b there is no representation of cellular respiration in the model environment. c there is no representation of photosynthesis in the model environment. d there is no representation of ingestion in the model environment.

Explanation:

The carbon - cycle involves processes like photosynthesis, cellular respiration, and decomposition. In the given micro - environment, there are organisms that can decompose (heterotrophic bacteria) and carry out cellular respiration (earthworm, bacteria). Ingestion is not a major process in the carbon - cycle in terms of carbon dioxide production. Photosynthesis is the process by which plants use carbon dioxide, water, and sunlight to produce glucose and oxygen. Since there are no plants in the model, there is no representation of photosynthesis, which is a key process in the carbon - cycle for taking in carbon dioxide.

Answer:

C. There is no representation of photosynthesis in the model environment.