Evolution

A team of scientists is studying  the fossils in the cross-section of the rock shown below. In which layer of the rock are the oldest leaf and fish fossils found?       

• layers 1 and 3
• layers 2 and 4
• layers 3 and 7
• layers 6 and 7

Jaguars with slightly larger jaws and teeth are better able to eat shelled reptiles in addition to mammals.  These Jaguars are likely to survive longer and leave more offspring than jaguars that eat only mammals.  Which scientific concept explains how large jaws and teeth became typical  characteristics of jaguars?

• Natural selection
• Artificial selection
• asexual reproduction
• biogeography

The femur and pelvis bones in the organism are examples of trace organs/structures that are no longer useful. This is an example of a?

• Homologous structure
• Natural Selection
• Vestigial Structure
• Fossil

The images below are examples of?

• Vestigial organs
• Artificial selection
• Genetic Drift
• Homologous Structures

The graph below shows the changes in the populations of beetles and wasps.  The wasp larvae feed on  the beetle larvae.  The beetle population is highest when the wasp population is—

• low
• high
• steady
• at zero

Scientists sometimes compare the limbs of these organisms to look for evidence of common ancestry. The limbs provide evidence of common ancestry because they?   

• Have the same basic structure         
• Are the same species
• Perform the same function
• Are parts of mammals

After examining the fossil record, scientists have determined that scorpions today are much smaller than their extinct ancestors. For example, Jaekelopterus rhenaniae, a giant scorpion species that lived 225 million to 460 million years ago, was 2.5 meters long. Which of the following conclusions is supported by this information?

• Scorpions living today have increased their numbers since they first appeared
• Scorpions in the fossil record are smaller than their descendants were
• Scorpions have changed as a result of natural selection
• Scorpions do not appear in their original state in the fossil record

inherited characteristic which increases chances of survival 

• Fossil
• Survival of the fittest
• Artificial Selection
• Adaptation

Also known as natural selection

• Fossil
• Artificial Selection
• Survival of the fittest
• Adaptation 

Selection by humans for breeding of useful traits

• Fossil
• Artificial Selection
• Survival of the Fittest
• Adaptation