Question

which of the following are the primary producers in the carbon cycle in aquatic and terrestrial environments?
correct answer(s)
decomposers
photosynthetic plants
respiratory animals
photosynthetic bacteria
incorrect answer(s)

Explanation:

Primary producers in the carbon cycle are organisms that can convert inorganic carbon (such as \(CO_2\)) into organic carbon compounds through processes like photosynthesis. Photosynthetic plants (in terrestrial environments) and photosynthetic bacteria (which can be found in aquatic environments, for example, cyanobacteria) are capable of this. Decomposers break down dead organic matter and release carbon back into the environment (e.g., through respiration), but they do not produce organic carbon from inorganic sources as primary producers do. Respiratory animals consume organic carbon compounds and release \(CO_2\) through respiration, so they are not primary producers.

Answer:

photosynthetic plants, photosynthetic bacteria