Exam 4: Biodiversity and Evolution

Genetic engineering allows scientists to transfer genes between different species that would not interbreed in nature.

The fossils found so far probably represent about 50% of the species that have ever lived.

What is the variety of processes, including matter cycling and energy flow within ecosystems, which result from species interacting with one another in food webs?

Briefly explain how natural selection has worked, and is working to change populations over time.

Which of the following would be the least likely cause for the decline of amphibians?

What is the ability of one or more organisms in a population to tolerate a chemical designed to kill it, such as when bacteria tolerate antibiotics?

Species that provide early warnings of damage to a community or an ecosystem are called ____.

Biological evolution by natural selection is when genes ____, individuals ____, and populations ____.

Consider the accompanying figure and then explain how the movement of the continents can help explain why some species have the geographic distribution that is observed today.

The scientific study of insects is called ____.