Exam 4: Biodiversity and Evolution

Use the figure above to answer the following question(s). -Which of the two species on the graph is more prone to extinction and why?

What term describes the number of different species in a given area?

The scientific study of insects is called ____.

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

Use the figure above to answer the following question(s). -What does the height of each of the curves on the graph represent?

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

Before conservation efforts facilitated their comeback,the American alligator population was nearly completely wiped out primarily because of ____.

What are amphibians?

Non-native species can spread rapidly if they find a new location with favorable conditions,often because they do not face the same ____ that they face in their native niches.

Scientists are now able to produce desirable traits in some organisms by adding,deleting,or changing segments of its DNA.This process is known as ____.

The loss of a(n)____ can lead to population crashes and extinctions of other species in a community that depends on them for certain ecosystem services.

Compounds found in the ____ of certain amphibians have been isolated and used in pharmaceutical products.

Research performed by Edward O.Wilson on ____ has been applied to the study and understanding of other social organisms,including humans.

Fossils tell us about the long history of life on the earth and so far,our fossil record probably represents ____ of all species that have ever lived.

According to the International Union for Conservation of Nature,more than ____ percent of all known amphibian species are declining in numbers.

The fact that tectonic plates drift influences evolution by ____.

Estimates indicate the average annual background extinction rate is one species lost for each million species on earth per year.

Even if a beneficial heritable trait is present in a population,the population's ability to adapt may be limited by its ____________________.

The diversity that enables life on the earth to adapt and survive environmental changes is called ____.

One contributing factor of the declines in many frog species is that frog eggs have ____.