Chapter 18: Q. 19 (page 465)
How does the scientific meaning of “theory” differ from the common vernacular meaning?
The theory is defined as a hypothetical and speculative explanation for anything that is not based on true or accurate facts. It demonstrates that the theory's knowledge is insufficient to support something.
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Two species of fish had recently undergone sympatric speciation. The males of each species had a different coloring through which the females could identify and choose a partner from her own species. After some time, pollution made the lake so cloudy that it was hard for females to distinguish colors. What might take place in this situation?
What do both rate of speciation models have in common?
Which of the following situations will lead to natural selection?
a. The seeds of two plants land near each other and one grows larger than the other.
b. Two types of fish eat the same kind of food, and one is better able to gather food than the other.
c. Male lions compete for the right to mate with females, with only one possible winner.
d. all of the above
Which variable increases the likelihood of allopatric speciation taking place more quickly? a. lower rate of mutation b. longer distance between divided groups c. increased instances of hybrid formation d. equivalent numbers of individuals in each population
Which situation is most likely an example of convergent evolution?
a. Squid and humans have eyes similar in structure.
b. Worms and snakes both move without legs.
c. Some bats and birds have wings that allow them to fly.
d. all of the above
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