Exam 12: Mechanisms of Evolution

A friend states,"Exposing bacteria to antibiotics causes the cells to mutate to become antibiotic resistant." Explain to your friend why he is incorrect and provide the correct explanation.

Which of the following is NOT a cause of evolution?

Which of the following is NOT a step in the evolutionary process?

Propose an explanation for why the circumference of newborn babies' heads would act as a stabilizing selective force in a population of humans that does not have access to modern medical care.

Evolution can be described as

Both mammals and octopi have evolved similar eye structures.This is an example of

Gene flow occurs

New alleles arise by

Which of the following statements concerning evolution is FALSE?

What pattern of natural selection is demonstrated by the information in the graph below? What is the selective pressure? What are the relative rates of evolution among the strains of bacteria? Provide your rationale.

Which of the following is true with regard to mutations?

The wings of a bird and the wings of a bat both form from the front appendages (arms).The bird wing is covered by feathers,and the bat wing consists of a thin layer of skin stretched between the "finger" bones.Are the wings of the bird and bat homologous or analogous?

Convergent evolution produces

A scientist is studying beak length in a species of hummingbird.The scientist establishes a population of birds with beaks ranging from very small to very long and allows the population to breed for 10 years.At the end of the experiment,she finds that the majority of birds in the population have very long beaks.This is an example of the ________ selection pattern of natural selection.

A mutation in a gene produces the identical protein to the original gene and,therefore,an identical trait.Will evolution act upon this mutation?

Match each example to one of the processes below. -Overfishing results in an endangered fish population with a very small population size.

Between 1980 and 1999,the Food and Drug Administration (FDA)approved 52 new antibacterial drugs.Only 8 new antibacterial drugs gained approval between 2000 and 2012.The lack of new antibacterial drugs may contribute to the ________ selection of antibiotic-resistant bacteria.

Match each example to one of the processes below. -A tourist carries seeds to a new location.These seeds are able to breed with plants of the same species in this new location.

The color of a certain species of beetle is determined by a single gene.Two beetles homozygous for green coloration (meaning they have two copies of the green allele)produce a single offspring with brown coloration.Brown color appeared in this offspring as a result of

Both insects and humans evolved jointed legs to allow locomotion on land.These structures are considered analogous because insects and humans