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Terms in this set (26)
Darwin and Wallace's theory of evolution by natural selection was revolutionary because it
Dismissed the idea that species a re constant and emphasized the importance of variation and chnage in population.
Which thinking shows population thinking?
Variation among individuals in a species is real and important.
The fossil record resembles the living species in the same geographic area. How does this pattern, also known as the law of succession, support the theory of evolution by natural selection?
It is evidence that species can change over time.
What is biological fitness?
Biological fitness measures the reproductive success of an individual relative to others in the population.
Cotton-topped tamarins are small primates with tufts of long white hair on their heads. While studying these creatures, you notice that males with longer hair get more opportunities to mate and father more offspring. To test the hypothesis that having longer hair is adaptive in these males, you should _____
determine if hair length is heritable.
If the bacterium Staphylococcus aureus experiences a cost for maintaining one or more antibiotic-resistance genes, then what should happen in environments from which antibiotics are missing?
These bacteria should be outcompeted and replaced by bacteria that have lost these genes.
How did thorns originate in roses?
A spontaneous mutation resulted in thorns and increased this rose's resistance to herbivory, so it was selected by natural selection to become dominant in the population.
Which statement about adaptation is correct?
The adaptive value of a trait varies as the environment changes.
Traits that are derived from a common ancestor, like the bones of human arms and birds wings, are said to be_____
Which evolutionary mechanism results in adaptation?
Considering the concept of the fundament asymmetry of sex, why is it adaptive for red deer mice to fight one another?
Male fitness is limited by their access to females and the winner of these fights is able to mate with more females than the loser.
Which of the following is the most predictable outcome of increasing gene flow between two population?
Decreased genetic difference between the two population.
Generation-to-generation change in the allele frequencies in a population is _____.
Reinforcement is most likely to occur when _____.
hybrids have lower fitness than either parent population
What occurs in a hybrid zone?
Which of the following describes vicariance?
A population is fragmented into isolated subpopulations.
If asked to join a science panel to speak to Congress, could you explain how this fragmentation process could lead to extinction?
Species can dwindle to extinction due to inbreeding, species can dwindle to extinction due to catastrophes, species can dwindle to extinction due to loss of genetic variation.
How it could lead to speciation?
Via allopathic speciation.
Which statement is correct?
Synapomorphies identify monophyletic groups.
Which of the following would be least likely in the fossil record?
Which statement about fossilization is correct?
Rare, local, or ephemeral species leave a poor fossil record.
Which of the following statements about adaptive radiation is correct?
Adaptive radiation occurs within a single lineage.
Adaptive radiation can be a direct consequence of four of the following five factors,
Which is strong evidence supporting the impact hypothesis for the extinction of the dinosaurs?
Extremely high quantities of iridium in rocks that formed around 65 million years ago
How can mass extinction events be distinguished from background extinctions?
A mass extinction occurs when at least 60 percent of species are wiped out within 1 million years.
A "one-snip test" is recommended....
One snip gets an ancestor and all of its.....
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