Question

2.2 review

1. analyze order the roles of producer, primary consumer, and secondary consumer from highest to lowest trophic level.
2. explain why are decomposers essential to the movement of matter in an ecosystem?
3. apply use figure 2 - 8 to support or refute the claim that an organism can feed at more than one trophic level.
4. identify which trophic level, if removed from a food web, would likely cause the most change in the ecosystem?

a. producer
b. primary consumer
c. secondary consumer
d. tertiary consumer

Explanation:

1. Producers are at the base of the food - web and produce energy through photosynthesis. Primary consumers eat producers and secondary consumers eat primary consumers. So the order from highest to lowest trophic level is secondary consumer, primary consumer, producer.
2. Decomposers break down dead organisms and waste materials, recycling nutrients back into the ecosystem, which is essential for the continuous movement of matter.
3. Many organisms can feed at more than one trophic level. For example, a bear can eat berries (producer - primary consumer interaction) and also fish (secondary consumer interaction).
4. Producers are the base of the food - web. If removed, it would cause a collapse as all other trophic levels depend on them for energy.

Answer:

1. Secondary consumer, primary consumer, producer
2. Decomposers recycle nutrients by breaking down dead organisms and waste.
3. An organism can feed at more than one trophic level as many organisms have diverse diets.
4. A. producer