Fossils And Extinction

Question 1

Throughout the History of Life on Earth, Scientists Estimate that About __ Billion Different Species Have Existed.

Answer 1

4.

Question 2

Extinction is the Permanent _______ of All the Members of a Species.

Answer 2

Loss.

Question 3

As Conditions Change, New Species Evolve that are Better Suited to Survive the New ____________. The Older Species that can’t ______ with the Changes Gradually Die Out Because they’re Unable to Compete Well for Food.

Answer 3

Conditions…Cope…

Question 4

Different Causes of Extinction:

Answer 4

• Change of Temperature.
• New Predators.
• New Diseases.
• New Competitors.

Question 5

Living Organisms can Change an Environment and Cause Extinction in Which Different Ways:

Answer 5

• New Predators can Wipe Out Unsuspecting Prey Animals Very Quickly if the Prey Animals don’t have Adaptations to Avoid Them.
• New Diseases can Bring a Species to the Point of Extinction.
• One Species can Cause Another to Become Extinct by Successful Competition.