Question

1. which organism would occupy the level on an energy pyramid with the most energy? mark only one oval. a. bobcat b. bird c. grasshopper d. carrot
2. in the carbon cycle, where do the producers get their carbon? mark only one oval. a. the atmosphere b. carbohydrates in plants c. fossil fuels d. animal remains
3. use the food web above to answer the following question. which of the following would be affected if small planktivorous fish died off? mark only one oval. herbivorous ducks sea ducks tundra swan osprey

Explanation:

1. In an energy pyramid, the level with the most energy is occupied by producers. A carrot is a plant (producer), while a bobcat, bird, and grasshopper are consumers. Producers capture energy directly from the sun through photosynthesis and form the base of the energy - pyramid with the most available energy.
2. Producers in the carbon cycle get their carbon from the atmosphere. They take in carbon - dioxide ($CO_2$) during photosynthesis to make carbohydrates. Carbohydrates in plants are the result of carbon - fixation, not the source of carbon for producers. Fossil fuels are a long - term carbon storage and not the immediate source for producers. Animal remains contribute to the carbon cycle but are not the source for producers.
3. Looking at the food web, small planktivorous fish are prey for large piscivorous fish and sea ducks. If they died off, sea ducks would be affected as they rely on them as a food source. Herbivorous ducks do not eat small planktivorous fish. Tundra swans and osprey are not directly connected to small planktivorous fish in the food web as their prey.

Answer:

1. d. carrot
2. a. the atmosphere
3. Sea Ducks