Construct and interpret food webs showing the interdependence of organisms in an ecosystem, explaining how a change in one population affects others
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Question 1 of 3
A meadow food chain contains 1000 g of plant biomass, 100 g of herbivore biomass, and 10 g of carnivore biomass. Which explanation best describes why the total biomass becomes smaller at each higher trophic level?
Question 2 of 3
The table below shows the amount of algae (a food resource) in a pond and the corresponding number of fish observed. Algae (grams) | Fish population 10 | 20 20 | 35 30 | 45 40 | 55 Which statement is best supported by these data?
Question 3 of 3
A researcher introduces the same species of herbivorous beetle into two ecosystems. In the forest ecosystem the beetle’s preferred plant is plentiful, while in the grassland ecosystem that same plant is scarce. A native carnivorous spider preys on the beetle in both ecosystems. Which statement best predicts the relative change in the spider’s population in the two ecosystems?
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