Plastics are ________
A) moldable, petroleum-based hydrocarbons
B) naturally occurring macromolecules
C) synthetic proteins
D) unstable and break down easily
E) assembled by enzymes in cells
A
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The term __________ refers to the process whereby regions or people within a state demand independence and autonomy at the central government's expense.
a. centrifugal b. transference c. devolution d. demolition e. centripetal
What is necessary for a mineral to cement rock grains together?
A) The cement mineral and the grains must be similar in type. B) The cement mineral must be a covalently-bonded mineral. C) The cement mineral must be dissolved in water. D) The cement mineral must have the same type of bonding as the grains.
Soils that are rich in organic matter are most likely to be:
a. forest soils b. pedalfers c. tropical soils d. prairie soils
On this map, identify the letter that is over an island arc.
A) A
B) B
C) C
D) D
E) Feature is not labeled.