The example of the sickle-cell allele demonstrates a key aspect of evolution through natural selection, in that
A. adaptation and fitness are in relation to the individual organism, not the general population.
B. human populations in the tropics are the most susceptible to random changes caused by natural selection.
C. natural selection increases the variety in a population upon which subsequent natural selective processes can act.
D. adaptation and fitness are in relation to specific environments; traits are not universally adaptive or maladaptive.
E. although natural selection usually acts upon the phenotype, it can sometimes act upon the genotype.
Answer: D
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A) increase B) decrease C) not change D) exactly double
When cultural practices result in the creation of problems, we refer to these practices as __________
Fill in the blank(s) with correct word
The nobility in the ranked society of Tikopia used the tribute they collected largely to increase their own wealth
a. True b. False
Who is associated with the principle of original horizontality?
a. Steno b. Lyell c. Smith d. Hutton