Exam 6: Organic Evolution

Which of the following is required for natural selection to occur in a population?

Lamarck's theory of evolution was centered on the idea that

What is the correct sequence extending down from the phenotype to the genetic unit?

The concept that each successive stage in the development of an individual represents the adult form that appeared in development of its evolutionary history is termed

In the early 1990s,the African honeybee migrated across the Mexican border into the United States.Our domesticated honey bee-originally from Europe-is slow to sting,requires abundant flower nectar,forages later in the morning,does not tolerate subtropical conditions as well as the "Africanized" honey bee,and stores much honey but only produces enough new brood to swarm once a year.Because the European honey bee was performing poorly as a honey producer in South America,the African subspecies had been imported in a breeding experiment.The African honey bee formed small nests,foraged earlier and created more honey using smaller nectar sources,produced less honey stores and more brood,swarmed four or five times a year,and was fast to sting.However,when African queens escaped,the two bee populations interbred and the African genotype spread about 300 kilometers north each year.Unexpectedly,a hundred kilometers behind the expanding range of the African honey bees,the European and hybrid hives died out in subtropical areas and the bees were essentially 100 percent African.How would this be explained in evolutionary genetics terms?

Sibling species are represented by

Which one of the following is NOT an observation of a population where natural selection is at work?

If Hardy-Weinberg equilibrium is met,what is the net effect?

Explain why extinction is a necessary aspect of evolution.What would happen if nothing died and there were no extinction?

The generation of ecologically diverse species from a common ancestral stock is called ________________.

Research indicates people are most likely to select a mate from a nearby village or city,or high school or college.Therefore,the Hardy-Weinberg equilibrium does not apply well to human populations because

When we compare amino acid differences to estimate the evolutionary "distance" between organisms,what assumptions are being made about the rate at which mutations occur over time?

A population that undergoes a major reduction in size is said to experience a population ___________.

Which condition is NOT among the requirements of Hardy-Weinberg equilibrium?

Niles Eldridge and Stephen Jay Gould proposed that speciation is an episodic event that occurs in variable time periods ranging from thousands to hundreds of thousands of years,all of which are geologically brief time periods,and that there are long periods of evolutionary stasis in between,a theory called _______ ________.

Define sexual selection and provide an example.

Which of the following is a (are)true fossil(s)?

Before the 18^th century,theories on the origin of species are best described as

In his voyage on the H.M.S.Beagle,most of Darwin's observations about changes in species over time and in different environments took place in and near where?

Which of the following contribute(s)to evolution?