Question

review questions

1. what is the difference between a food chain and a food web?
2. why are producers always at the start of every food chain?
3. why are decomposers an important part of every ecosystem?

Explanation:

1. A food chain is a linear sequence of organisms where each is eaten by the next. A food web is a complex network of multiple food chains in an ecosystem, showing all feeding relationships.
2. Producers (like plants) make their own food via photosynthesis. They are the base of the energy pyramid. Other organisms (consumers) depend on them for energy, so producers start food chains.
3. Decomposers (e.g., fungi, bacteria) break down dead organisms. This recycles nutrients (like carbon, nitrogen) back into the soil. Nutrients are then used by producers again, maintaining ecosystem balance.

Answer:

1. A food chain is linear; a food web is a network of food chains.
2. Producers make food (via photosynthesis), providing energy for consumers.
3. Decomposers recycle nutrients from dead organisms for producers.