What is the term for each step in the transfer of energy and matter within a biological community?

• A. Population
• B. Ecological niche
• C. Biogeochemical cycle
• D. Trophic level

Answer: (D)

Verified step by step guidance

1. Understand the concept of energy and matter transfer within a biological community. This process involves the movement of energy and nutrients through different organisms in an ecosystem.
2. Learn the definition of a trophic level. A trophic level represents each step in the food chain or food web, where organisms are grouped based on their role in energy transfer (e.g., producers, primary consumers, secondary consumers, etc.).
3. Differentiate between the terms provided in the question: 'Population' refers to a group of individuals of the same species living in a specific area; 'Ecological niche' describes the role and position of an organism within its environment; 'Biogeochemical cycle' refers to the movement of chemical elements through biological, geological, and chemical processes.
4. Recognize that 'Trophic level' is the correct term because it specifically describes the hierarchical steps in the transfer of energy and matter within a biological community.
5. Apply this understanding to analyze food chains or food webs, identifying the trophic levels (e.g., producers at the base, followed by herbivores, carnivores, and decomposers).