What was the vital step for the development of metallurgy and the wider and rapid distribution of metals evident after 5000 b.p.?
a. smelting
b. copper hammering
c. heating copper at low temperatures
d. finding richer veins of copper
e. investing more labor into mining
Answer: a. smelting
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Two people (both heterozygotes) are able to taste a chemical substance called PTC. The ability to taste PTC is caused by a dominant allele (T). The inability to taste PTC is caused by a recessive allele (t). What proportion of their children would be expected to have the ability to taste PTC?
a. 3/4 b. 1/2 c. All d. 1/4 e. 2/3
Which of the following is a cultural generality?
A. Life in groups B. The use of fire C. Incest taboo D. Use of symbols E. Nuclear family
Which of the following best defines the term genotype?
a. the actual alleles an organism carries b. the physical expression of an organisms genes c. the role of the environment plays in gene expression d. an organisms haploid gametes
If an 8 percent decrease in price leads to a 4 percent increase in the quantity demanded of the good, as a result of the price change, the total revenue for this product will ________.
A) not change B) increase C) double D) decrease