The most common mechanism for sympatric speciation in plants is
A. geographic isolation.
B. punctuated equilibrium.
C. disruptive selection.
D. polyploidy.
E. spontaneous mutation.
Answer: D
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Rostow's model of economic development
A) is equally applicable to the countries of today as it was to Western countries in the 19th century. B) claims that all countries can reach high GDP per capita if they follow the right path. C) is accepted as valid by most geographers. D) takes into account the interdependence of countries. E) is accepted as valid by most geographers and takes into account the interdependence of countries.
The position of a gene located within a light G band on the short arm of chromosome 5 could be designated as
A) 5p13-pter. B) 5p13-qter. C) p513. D) 5q13-qter. E) q513.
Which of the following bases is contained by DNA but not RNA?
A. Adenine B. Guanine C. Thymine D. Uracil
When gametes fuse during fertilization, a(n) ________ is produced
A) haploid individual B) zygote C) sperm D) egg