Regarding the example of the peppered moth, which of the following is not true
a. the two color patterns resulted from genetic variation in the species
b. it has recently come under criticism
c. natural selection acted upon pre-existing variation in the population
d. the dark is more visible on the trees darkened by pollution
e. the most common variety of the peppered moth in England, prior to the 19th century, was a mottled gray color.
d
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By ___, according to one prediction in the text, as much as 95 percent of the world's rain forests might be gone.
A. 2020 B. 2035 C. 2100 D. 2150
Given evidence of cooperative hunting and the manufacture of complicated tools, it is plausible to assume that H. erectus had rudimentary speech.
Answer the following statement true (T) or false (F)
An example of an acclimatory adjustment would be:
A. an increase in the basal metabolic rate in a cold climate B. sweating in a warm environment C. an increase in the number of capillaries in a high-altitude environment D. all of these
Traditional racial classification assumed that biological characteristics such as skin color were determined by heredity and remained stable over many generations. We now know that
A. a biological similarity such as skin color is always the result of both common ancestry and natural selection. B. a biological similarity such as skin color is also the result of natural selection working among different populations that face similar environmental challenges. C. skin color is determined by sun exposure and the amount of melanin in our diets. D. skin color is determined by a single gene that is prone to mutations over many generations. E. skin color is actually determined throughout child development.