According to Skinner, as noted by Gmelch in "Baseball Magic," magic once established requires to be maintained
a. regular rewards
b. sporadic rewards
c. formal instruction
d. uncertainty
Correct Answer: b
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Which of the following groups has the highest percentage of type A blood?
a. Mapuche Indians of Argentina b. Chippewa Indians of the United States c. Maya Indians of Mexico d. Saami (Laplanders) of Finland
The Hawaiian system of terminology is strongly tied into the unilineal descent system
a. True b. False Indicate whether the statement is true or false
Which of the following was NOT true about the Levallois technique of making tools?
A. It involved more complex preparation of stones to make tools. B. It provided higher quality tools. C. It provided tools that could be refined for a wide variety of uses. D. It started in Eurasia and spread to Africa.
________ are changes in the DNA molecules of which genes and chromosomes are made and are the most important source of variety on which natural selection operates.
A. Genotypes B. Alleles C. Clines D. Balanced polymorphisms E. Mutations