Question

1. how much energy is typically transferred from one trophic level to the next? a. 25% b. 10% c. 50% d. 90% 14. what is a significant impact of deforestation on ecosystems? a. encouraging biodiversity b. decreasing carbon dioxide levels c. disrupting habitats and reducing biodiversity d. enhancing oxygen balance 15. in the context of symbiotic relationships, what characterizes parasitism? a. both species benefit b. one species benefits at the expense of another c. both species are harmed d. both species are unaffected

Explanation:

1. In ecological energy - transfer, the 10% rule states that approximately 10% of energy is transferred from one trophic level to the next.
2. Deforestation destroys habitats and reduces biodiversity as many species lose their homes and food sources. It also increases carbon - dioxide levels and disrupts the oxygen - carbon cycle.
3. Parasitism is a symbiotic relationship where one species benefits at the expense of another.

Answer:

1. B. 10%
2. C. Disrupting habitats and reducing biodiversity
3. B. One species benefits at the expense of another