9/26/22 Food Chains & Web Modeling

Which of the following is the primary energy source for producers in near-surface marine communities? a. Solar energy from the Sun b. Carbon dioxide from consumers c. Oxygen in the atmosphere d. Heat from Earth's interior

a. Solar energy from the Sun

In a given ecosystem, producers convert solar energy into 15,000kcal of chemical energy stored in organic compounds. Which of the following is the most likely amount of energy available to secondary consumers? a. 1.5 kcal b. 150 kcal c. 1,500 kcal d. 13,500 kcal

b. 150 kcal

Of the following organisms, which occupies the lowest trophic level? a. spider b. deer c. lion d. hawk

b. deer

What best describes the movement of energy in an ecosystem? a. Energy is constantly recycled by decomposers for use by producers. b. Energy is harnessed by producers, and available energy decreases with each trophic level transfer. c. Energy is absorbed by plants through water and soil and then moves up the food chain through consumers. d. Energy is magnified as it moves up the trophic levels, and tertiary consumers store the most energy in a food web.

b. Energy is harnessed by producers, and available energy decreases with each trophic level transfer.