The protein molecule that occurs in red blood cells and binds to oxygen molecules is called
a. valine.
b. hemoglobin.
c. proline.
d. the cell membrane.
e. the ribosomes.
B
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A group of humans that migrates from sub-Saharan Africa to northern Europe is an example of __________
a. genetic drift b. gene flow c. founder effect d. differential mortality
Human bipedalism
A) is extremely specialized B) is an efficient and flexible locomotor pattern C) often results in foot and back ailments D) is a compromise between upright posture and the birth process E) all the above
Match the concept to its definition:
1. independent assortment 2. true-breeding 3. segregation the inheritance patterns of differing traits are independent of one another bred only with the same kind and shows the same trait over many generations in the production of sex cells, the paired hereditary units separate into different sex cells
Which of the following describes a vertical economy?
A. a system of top-down exchange across regions B. a system that exploits closely-spaced environmental zones that contrast with one another in altitude, rainfall, overall climate, and vegetation C. a type of segmentary lineage organization found in regions of East Africa D. a means of integrating a society based on hereditary inequality and coercion E. a form of indirect-biased transmission