The study of inheritance in individuals tells us about how genes can be combined and recombined through sexual reproduction, but to see how species change over time as natural selection favors some combinations over others, we need to look at:
a. two individuals.
b. populations.
c. gene flow.
d. genetic drift.
e. directional selection.
b
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When a firm hires an additional worker, the firm's output ________ and the firm's total cost ________.
A) increases; increases B) decreases; decreases C) increases; decreases D) decreases; increases
The sexual skin:
A. swells and turns bright pink or red during estrus B. is used by males to attract females C. is found instead of sexual dimorphism in some primates D. is found only in New World monkeys
The motor hypothesis of language suggests that the initial event that led to the modern motor capacity for language was the:
A. evolution of erect bipedalism B. ability to manufacture stone tools C. shift to hunting from scavenging D. ability to use a precision grip
Neandertals were advanced in their use of spear throwers for long-distance hunting
a. True b. False Indicate whether the statement is true or false