Evolution Quiz

Which structures are between species that are similar structure, but have different functions (mammal forearms), and show evolution from a common ancestor?

• vestigial structure
• homologous structure
• analogous structure
• mutation 

If an organism has a vestigial structure, that structure likely once had a function in a(n

• close relative.
• early ancestor.
• unrelated organism.
• embryological stage.

As developing embryos, some organisms appear to have features that are similar in structure. As these organisms continue their development, features that were similar in the embryonic stage develop into different structures that have different functions. What type of evidence of common ancestry do these features represent?

• vestigial structures
• fossil structures
• analogous structures
• homologous structures

Which evolutionary mechanism is necessary for evolution to occur?

• genetic drift
• gene flow
• nonrandom mating
• mutation 

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If a bacteria is antibiotic resistant, what does that mean?

• bacteria have inherited a favorable variation that is immune to antibiotics
• bacteria changed their DNA to be resistant to antibiotics
• bacteria do not like antibiotics 
• bacteria will die if exposed to antibiotics

Why did Darwin's finches develop different beaks?

• individual birds changed their beaks based on what food they wanted to eat 
• they developed in different countries and then migrated to different islands on the Galapagos
• To tell each other apart for mating
• The beaks are a feeding adaptation due to competition for scarce food

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Which describes natural selection?

• Some live and some die in each generation   
• Only the largest and strongest survive
• Random assortment of genes results in better characteristics in the following generations
• The best adapted individuals survive and reproduce, contributing the most to the next generation

The concept of gene flow is demonstrated a wolf leaves his pack, joins another, and reproduces. When the wolf contributes to the gene pool of the new herd, which of these most likely increases?

• natural selection
• genetic variation
• environmental fitness
• reproductive mutations

A prey population consists of individuals with a variety of running speeds. The adaptation that allows some of these animals to run fast would be an example of natural selection if it helps them-

• Survive and undergo mutations in their DNA
• Lower the mortality rates of the population
• Produce offspring that run at average speeds
• Reproduce and increase the frequency of their genes in the population

Which of the following is true of genetic drift?

• It can decrease genetic diversity in a population
• It is necessary in order for a population to be in equilibrium
• It can increase genetic diversity in a population 
• It plays a much larger role in determining the genetic makeup of populations than natural selection 

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