Question

an energy harvesting process is shown here that occurs commonly in ecosystems. which statement(s) correctly identify the process and its role in the ecosystem? select all that apply.
a this process is performed by producers in an ecosystem.
b this process is photosynthesis. its products are glucose and oxygen.
c this process is performed by heterotrophs and producers in the ecosystem.
d products from this reaction are used as reactants in cellular respiration.
e this process is cellular respiration. its products are carbon dioxide and water.

Explanation:

• Option A: Producers (like plants) perform the Calvin cycle as part of photosynthesis.
• Option D: The sugar (glucose) produced in the Calvin cycle (part of photosynthesis) is used as a reactant in cellular respiration (\(C_6H_{12}O_6+6O_2

ightarrow6CO_2 + 6H_2O\)).

• Option B: The Calvin cycle is part of photosynthesis, but oxygen is produced in the light - dependent reactions, not the Calvin cycle (light - independent reactions).
• Option C: Heterotrophs do not perform the Calvin cycle. Only producers (autotrophs) perform photosynthesis (which includes the Calvin cycle).
• Option E: The Calvin cycle is part of photosynthesis (\(6CO_2+6H_2O

ightarrow C_6H_{12}O_6 + 6O_2\)), not cellular respiration (\(C_6H_{12}O_6+6O_2
ightarrow6CO_2 + 6H_2O\)).

Answer:

A. This process is performed by producers in an ecosystem.
D. Products from this reaction are used as reactants in cellular respiration.