Which numbered layer represents the youngest layer?
A) 1
B) 2
C) 3
D) 4
D) 4
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The Nature Conservancy, World Wildlife Fund, Greenpeace and the Grameen Bank are examples of non-governmental organizations working toward environmental conservation.
Answer the following statement true (T) or false (F)
Which of the following is a fish harvesting method used for harvesting schools of fish in shallow or surface waters, which has caused the death of large numbers of dolphins?
a. longlining b. purse-seine fishing c. trawler fishing d. drift-net fishing e. sport fishing
If grass stores 1,000 energy units received from the sun, the ecological efficiency of the ecosystem is 10%, and the trophic levels are grass ? cow ? human, how many units of energy does the human receive of the original 1,000 units?
A. 900 B. 200 C. 100 D. 10 E. 1
Glaciers are a single, solid piece of ice that flows from the Zone of Accumulation to the Zone of Saturation
Indicate whether this statement is true or false.