Exam 5: Evolution and Biodiversity

What energy source's harmful effects did the development of the ozone layer protect early organic life from? 

Which term refers to a change in the genetic composition of a population over successive generations? 

In a population of fruit flies,pink eye colour is the most common,although white eyes and red eyes are also present.Over the course of time and many generations,the proportion of individuals with pink eyes steadily increases.What is the most likely conclusion about the increase in pink eyes? 

What is least likely to affect the patterns of speciation and extinction? 

Which gas played a critical role in forming the Earth's primitive atmosphere? 

An ice age is an example of an event that can cause a(n)______________________________.

That the hunting behaviour of bats has influenced the avoidance behaviours of their prey,moths,is an example of ____________________.

Which term refers to the small genetic changes experienced by a population within a species? 

Dolly,the most famous,and perhaps the most controversial,sheep was produced as a result of ____________________.

If the evolution of the Earth were compressed into a 24-hour time frame,at what time did homo sapiens appear? 

In a certain environment,there is selection for the mean coloration of snail shells.What type of natural selection is this? In what type of environment is this most common?

Selective breeding is a method of artificial selection.

What is the definition of gene pool? 

Convergent evolution occurs when two distantly related groups of organisms develop similarities because they are adapting to similar environments.

Which of the following best describes biodiversity? 

Which statement best describes a transgenic organism? 

In speciation,two species interbreed to form one new species.

What explains the origin of organic molecules on Earth? 

Natural selection relies on three truths,one of which is based on genetic mutations.

What might be an example of coevolution?