The web of life refers to the .a. evolutionary relationships among living organisms;b. connections between species in an ecosystem;c. complicated nature of genetic variability;d. flow of information from parent to child;e. predatory effect of humans on the rest of the natural world

If the GPP of a grassland is 5000kcal/m2/year and 55 percent is used up by cellular respiration, what is the NPP?a. 2250kcal/m2/yearb. 2750kcal/m2/yearc. 5000kcal/m2/yeard. need more data

Which of the following was a result of the Hubbard Brook watershed deforestation experiment? (A) Most minerals were not recycled within the intact forest ecosystem. (B) Calcium levels remained high in the soil of deforested areas. (C) Deforestation decreased water runoff. (D) The nitrate concentration in waters draining the deforested area became dangerously high.

Explain why decomposition rates in a field in Nebraska would differ from the decomposition rates in a field in the Amazon. How do decomposers regulate nutrient availability in ecosystems?

The Hubbard Brook watershed deforestation experiment yielded all of the following results except which of the following?a. Most minerals were recycled within a forest ecosystem.b. Calcium levels remained high in the soil of deforested areas.c. Deforestation increased water runoff.d, The nitrate concentration in waters draining the deforested area became dangerously high.

Which of the following would be considered an example of bioremediation?a. adding nitrogen-fixing microorganisms to a degraded ecosystem to increase nitrogen availabilityb. using a bulldozer to regrade a strip minec. reconfiguring the channel of a riverd. adding seeds of a chromium-accumulating plant to soil contaminated by chromium

Why are the open oceans nutrient poor? Why are coastal areas and intertidal habitats relatively nutrient rich?

If you applied a fungicide to a cornfield, what would you expect to happen to the rate of decomposition and net ecosystem production (NEP)?a. Both decomposition rate and NEP would decrease.b. Neither would change.c. Decomposition rate would increase and NEP would decrease.d. Decomposition rate would decrease and NEP would increase.

Explain why it is more energy efficient (in terms of the amount of total NPP required) to eat a pound of tofu (bean curd) than a pound of hamburger.