PART I: Choose the best answer from the given alternatives

51. Which of the following can be the potential cause of water pollution?
A. Sediments
B. Organic Chemicals
C. Inorganic plant nutrients
D. Pathogens
E. All of the Above

52. One of the following water usages is more consumptive than any others:
A. Industrial
B. Household
C. Agriculture
D. Recreational
E. All of the Above

53. Which source of fresh water constitutes the highest proportion of global fresh water?
A. Polar ice caps and glaciers
B. Groundwater
C. Wetlands
D. Rivers
E. None of the Above

54. One of the following has nothing to do with deforestation:
A. Timber production
B. Poverty
C. Population Growth
D. All of the Above
E. None of the Above

55. One of the following is among the ways by which individuals can contribute to controlling deforestation:
A. Compel government and industries to make changes in forest policies
B. Communicate their uncertainties about the future of the world's forests to politicians through personal communication or in groups using petitions and rallies
C. Organize and mobilize groups to facilitate the protection, conservation, and monitoring of forests and other protected areas
D. Refrain from consuming products of companies involved in deforestation
E. All of the Above

56. One of the following is not an advantage of forests:
A. Economic benefits
B. Cultural Value
C. Medical Value
D. All of the Above
E. None of the Above

57. Which one of the following is not true about biodiversity?
A. It is variability among living things
B. It is the millions of different species
C. It is the diversity of their genes, physiologies, and behaviors
D. It is only unique among living portions of the earth