Which of the following statements is true? a. biodiversity provides additional resources that raise the carrying capacity of an ecosystem. b. biodiversity increases an ecosystem's ability to withstand changes. c. biodiversity makes an ecosystem more difficult to destroy. d. biodiversity provides additional sources of food for the weakest organisms in an ecosystem. i figured out that the answer is b.

which of the following determines the carrying capacity of a particular population by an ecosystem? a. keystone species b. pioneer species c. limiting factors d. renewable resources.

which of the following is a form of pollution triggered by formation of a gas, and can have dramatic effects on the health of the coral reef ecosystem? a. fog b. pesticides c. acid rain d. oil spill

Where does all the water go? according to the environmental protection agency (epa), in a typical wetland environment, 39% of the water is outflow; 46% is seepage; 7% evaporates; and 8% remains as water volume in the ecosystem (reference: united states environmental protection agency case studies report 832-r-93-005). chloride compounds as residuals from residential areas are a problem for wetlands. suppose that in a particular wetland environment the following concentrations (mg/l) of chloride compounds were found: outflow, 60.4; seepage, 73.7; remaining due to evaporation, 26.4; in the water volume, 46.8. (a) compute the weighted average of chlorine compound concentration (mg/l) for this ecological system. (round your answer to one decimal place.) mg/l (b) suppose the epa has established an average chlorine compound concentration target of no more than 58 mg/l. does this wetlands system meet the target standard for chlorine compound concentration? yes. the average chlorine compound concentration (mg/l) is too high. yes. the average chlorine compound concentration (mg/l) is lower than the target. no. the average chlorine compound concentration (mg/l) is lower than the target. no. the average chlorine compound concentration (mg/l) is too high.

In many humans, exposing the skin to sunlight over prolonged periods of time results in the production of more pigment by the skin cells (tanning). this change in skin color provides evidence that -

Wich level of organization includes all the other levels or organizations