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10. Of the organic matter produced annually in the biosphere, the oceans produce the
equivalent of:
A. 33%
B. 20%
C. 67%
D. 86%
11. What is the human impact that most affects the biodiversity of the oceans?:
A. Climate change
B. Overfishing
C. Habitat destruction and modification
D. Pollution
12. If the current rate of plastic waste dumped into the ocean continues unabated, it will
outweigh the biomass of fish in the world's oceans:
A. 2050
B. 2075
C. 2100
D. 2125
13. Human life for its survival depends on:
A. The oceans
B. Land animals
C. Land and oceans
D. Vegetation
14. The condition of forests is influenced by:
A. Forest fires
B. Population growth
C. Fragmentation
D. All three of the above
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