Amphibians are dying in large numbers after being infected by an aquatic fungus called Batrachochytrium dendrobatidis. The origin of this fungus is unknown, but scientists suspect
that humans are helping spread it. More than 350 amphibian species have been affected, and
at least 200 species of frogs have suffered serious reductions in population or become extinct.
The map below shows the worldwide distribution of B. dendrobatidis.
What will be the most likely impact of the decline in frog populations resulting from the fungal
infection?
Plants will no longer grow in the waters of the affected ecosystems, and fish species will increase.
O Populations of algae and mosquitos will increase, leading to fish die-offs and potential increases in
human malaria cases.
New species of frogs that feed on both the fungus and the infected species of frogs will evolve.
O The fungus will move on land and destroy reptile and mammal populations in tropical ecosystems.

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.

Regarding most of the narrator’s story, which word best describes the tone?

Which are characteristics of flukes? check all that apply. a they are free living. b they are a type of flatworm. c they reproduce sexually. d they have eyespots. e they are segmented.