What are the units used to express primary production?
a. pgC/m2/yr
b. ngC/m2/yr
c. ?gC/m2/yr
d. mgC/m2/yr
e. gC/m2/yr
e
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Indicate whether the statement is true or false
The biome with the greatest number of ecological niches and highest species diversity is ________
A) desert B) chaparral C) deciduous forest D) tropical rain forest E) boreal forest
What caused the collapse of the human population on Easter Island from its peak in 1550 CE?
A. A volcanic eruption buried the island in ash in 1588 CE. B. Human activities overwhelmed the environment. C. The society went through a demographic transition. D. A series of tsunami hit the island in 1551 CE. E. Dutch sailors introduced a foreign virus in 1722.
A squids mouthpiece resembles a ________
A) dog's mouth B) dolphin's blowhole C) parrot's beak D) suction cup E) volcanic crater