Economists are concerned with an individual's
A) needs because needs represent the most important goods to an individual.
B) needs because economists define needs to be the goods people need to survive.
C) wants because, unlike needs, wants lead to shortages in the economy.
D) wants because the existence of wants leads to scarcity.
Question 2
The marginal tax rate shows
A) the percentage of income which a typical family pays in tax.
B) the average rate of taxation in the economy.
C) the deductions which are permitted for child care and medical expenses.
D) the extra tax due on an extra dollar of income.
Acromegaly in one individual from a pair of identical twins.
The nitrogen cycle. Numbers represent fluxes as 1012 g N per year (data from Schlesinger 1991, after
Interior nodes represent common ancestors
Individual Tubule Functions
Niche: An individual’s ecological role
Important Bonds in Biological Molecules