Which of the following is an example of a natural cause of extinction?
A. An insect species in the tropical forest that cannot escape predation by native bird species in the forest
B. The passenger pigeon that went extinct at the beginning of this century
C. Freshwater Great Lakes mussels that compete with the Zebra Mussel
D. Genetic assimilation as in the case of the hybridization of gray wolves or black ducks with mallards
E. All of these are examples of a natural cause of extinction
Answer: A
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Shale is metamorphosed into three rock types: (1) a banded gneissic rock; (2) a rock with small mica crystals with a shiny aspect; (3) a very shiny rock with large mica crystals; and (4) a dull slate with cleavage. Which of the following lists these rocks in order of increasing metamorphic grade?
A. 3, 2, 4, 1 B. 1, 2, 3, 4 C. 4, 3, 2, 1 D. 2, 3, 4, 1 E. 4, 2, 3, 1
Pioneer Species
What will be an ideal response?
Organically grown foods are typically
A) high in pesticide residues. B) usually less expensive than non-organic foods. C) grown with traditional methods, diverse crops, soil conservation and based in local economies. D) grown on farms that are typically larger than non-organic food farms.
If the rate of uptake of dissolved inorganic carbon by phytoplankton is measured, the rate of production of organic matter can be calculated.
Answer the following statement true (T) or false (F)