Question

1. which trophic level has an unlimited amount of energy available to it?

a. producers
b. primary consumers
c. secondary consumers
d. tertiary consumers

1. which of the following are biotic? (check all that apply).

a. y/n water
b. y/n air
c. y/n plants
d. y/n humans
e. y/n a cheetah

Explanation:

• For question 8: Producers (like plants) can make their own food through photosynthesis using sunlight (a seemingly unlimited energy source in the context of the ecosystem). Consumers (primary, secondary, tertiary) rely on consuming other organisms for energy, which is limited as energy transfer between trophic levels is inefficient (only about 10% of energy is passed on).
• For question 9: Biotic factors are living components of an ecosystem. Plants, humans, and a cheetah are living organisms. Water and air are abiotic (non - living) factors.

Answer:

1. A. Producers
2. C. Y Plants; D. Y Humans; E. Y A cheetah