The majority of sex-linked traits have loci on the X chromosome
a. True
b. False
Indicate whether the statement is true or false
True
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Which of the following is an effective mutagenic agent that could have affected the course toward plant domestication among the Natufians?
a. wind b. snow c. water d. fire
The fact that the brain of a human infant is less than 30 percent of its adult size is a consequence of:
A. the evolution of erect bipedalism B. a reduction in the length of gestation C. the development of language D. the development of pair bonding
The United States is a country of immigrants. Newly arrived immigrants tend to settle near one another for social comfort and support, thus forming small, semi-isolated populations. The frequencies of the ABO blood types in these populations are often very different from the population of the mother country. This is due to the fact that:
A. the small size of the immigrant population is not a random sample of the mother population B. mutation rates are higher in the United States C. natural selection quickly produces changes in the frequencies of ABO blood types D. none of these
Homo sapiens were foragers until about ____ years ago
a. 100,000 b. 50,000 c. 10,000 d. 2,000