What impacts does agriculture have on ecosystems and biodiversity?

South America Unit Exam?

• Question 30 Loss of biodiversity is a concern for: land animals oceanic animals land plants all of the above Question 31 Which of the following is the biggest cause of the extinction of most species? human beings and our activity the food chain the water cycle global warming Question 32 Why should anyone care about sustainable development as it relates to marine life in South America? Unsustainable fishing practices will deplete resources and reduce availability. Unsustainable fishing practices will deplete resources and adversely impact other ecosystems. Unsustainable fishing practices can ultimately drive up prices due to declining supply. All of the above. Question 33 How does overpopulation of many South American countries impact the United States? There is no impact on the U.S. Overpopulation reduces the availability of natural resources Overpopulation results in increased immigration to the United States Overpopulation results in increased globalization and sharing of cultures Question 34 Additional consequences of deforestation include: habitat fragmentation loss of biodiversity extinctions all of the above Question 35 Subsistence farmers are forced to migrate when: the trees they clear re-grow the land they clear becomes useless without nutrients cattle destroy their crops the weather turns bad Question 36 Pesticides are a problem when: rain washes the chemicals into the water system rain washes the chemicals into fishing areas rain washes the chemicals out into areas where animals are affected all of the above Question 37 Finding a solution to the problems of clear cutting involves: destroying the industries that rely on it considering the economic problems that would result solving only the short-term financial problems solving only the long-term financial problems Question 38 Trees get cut down for cattle to graze. What are other sources of proteins mentioned? fish soy and beans nuts all of the above Question 39 Clear cutting large areas of trees at one time: reduces the amount of rain raises temperatures to the land allows the sun to dry up the land all of the above Question 40 Which of the following includes burning the stumps to release the nutrients into the soil needed to grow crops? slash and burn agriculture intensive agriculture commercial logging none of the above help me help help

• Answer:

  Whoa !! When people see such a long list of questions, then they do not bother to answer. My suggestions, rather ask lots of short questions and you will get more good replies. If people have to take a long time to work out your answers, then they pass on to the next. 30. all of the above 31. human beings and our activity 32. Unsustainable fishing practices will deplete resources and adversely impact other ecosystems. 33. dunno - guessing Overpopulation results in increased immigration to the United States 34. all of the above 35. the land they clear becomes useless without nutrients 36. all of the above 37. dunno 38. all of the above 39. raises temperatures to the land allows the sun to dry up the land 40. slash and burn agriculture