Which elements are most abundant in living organisms?
A) oxygen, nitrogen, carbon, hydrogen, sulfur, and phosphorus
B) carbon, potassium, iron, magnesium, hydrogen, and nitrogen
C) hydrogen, carbon, calcium, potassium, oxygen, and phosphorus
D) oxygen, calcium, phosphorus, sodium, hydrogen, and carbon
A) oxygen, nitrogen, carbon, hydrogen, sulfur, and phosphorus
B) carbon, potassium, iron, magnesium, hydrogen, and nitrogen
C) hydrogen, carbon, calcium, potassium, oxygen, and phosphorus
D) oxygen, calcium, phosphorus, sodium, hydrogen, and carbon
Answer & ExplanationAnswer: A) oxygen, nitrogen, carbon, hydrogen, sulfur, and phosphorus
Explanation:
Living organisms often contain trace amounts of several elements, but the most abundant ones are oxygen, carbon, hydrogen, nitrogen, calcium, sulphur and phosphorus.
The production possibilities curve illustrates the basic principle that
A) if all the resources of an economy are in use, more of one good can be produced only if less of another good is produced.
B) the production of more of any one good will in time require smaller and smaller sacrifices of other goods.
C) an economy will automatically obtain full employment of its resources.
D) an economy's capacity to produce increases in proportion to its population size.
A) if all the resources of an economy are in use, more of one good can be produced only if less of another good is produced.
B) the production of more of any one good will in time require smaller and smaller sacrifices of other goods.
C) an economy will automatically obtain full employment of its resources.
D) an economy's capacity to produce increases in proportion to its population size.
Answer & ExplanationAnswer: A) if all the resources of an economy are in use, more of one good can be produced only if less of another good is produced.
Explanation:
A graph that describes the maximum amount of one good that can be produced for every possible level of production of the other good is nothing but a production possibilities curve.
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