Which is not correct about riparian zones of a a. They keep sediments from flowing into the stream b. They absorb nutrients and keep them out of the stream c. The shade makes the water cooler, which lowers the oxygen level d. They provide animal cooridors

Which of the following is an effect of pollution on nutrient cycling of polluted ecosystems? O a. More storage of carbon O b. Increased biomass Oc. Increased ecosystem diversity O d. More loss of nitrogen and phosphorous out of the ecosystem O e. Loss of decomposers O f. Both d and e

Select the figure that corresponds to the rocky intertidal zone of central California in the absence of sea stars. A B Α A B

The loss of an apex consumer would impact which trophic level of a food web? a. primary producers b. primary consumers c. secondary consumers d. all of the above

The process of certain elements through different trophic levels is also called    A. food chain  B. biodiversity C. biogeochemical cycling

Flux of anthropogenic Phosphorous from terrestrial to aquatic ecosystems can have negative effects, such as A. Eutrophication B. Ocean acidification C. Acid rain D. Both A and C E. A, B and C

Which of the following is a point source of pollution? a runoff from multiple large agricultural fields that carries chemicals like fertilizers and pesticides b sewer overflow of untreated waste c runoff from multiple farms pollutes a small lake d runoff that carries oil and spilled chemicals off interstate highways

Which of the following is the greatest threat to the world's Grasslands?  A. Overharvesting B. Agriculture C. Pollution D. Invasive Species

7. Analyzing relationship: Describe the relationship between ground water and surface water in a watershed. what human activities in a recharge zone can affect the ground water

Which of the following options is/are goods of ecosystem?A. Fresh airB. Fresh waterC Timber for furnitureD. All of the aboveE. None of the options are correct