What determines the chemical composition of the dust particles that form around a protostar?
A) heat
B) pressure
C) contents of the star that exploded to form the protostar
D) gravity of nearby objects
Answer: A
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Which of the following areas is NOT known to be a region with hydrocompaction problems?
a. Heart Mountain and Riverton areas of Wyoming b. Fort Collins, Colorado c. the Columbia Basin in Washington d. southwest and central Utah e. the San Joaquin Valley of Californi
Practitioners of shifting cultivation usually begin the process of clearing a new field when
A) the government tells them to do so.
B) they are certain the last frost is past.
C) the soil of the old field is depleted of nutrients.
D) the women vote to do so.
E) seasonal and annual rainfall patterns shift.
Transition-state analogs do which of the following?
A) They assist in the synthesis of specialized enzymes. B) They assist in transporting the substrate to the active site. C) They enhance enzyme activity. D) They inhibit enzyme activity.
An isopods attaching itself to a fish and derive its nutrition from the body fluids of the fish, robbing it of some of its energy supply, is an example of which of the following types of symbiotic relationship?
A) Commensalism B) Mutualism C) Naturalism D) Parallelism E) Parasitism