Semester 1 Review

What type of structure does the 4 organisms have?

• Homologous Structures 
• Analogous Structures 

What does a homologous structure show between organisms? 

• distant ancestors 
• common ancestors 
• secret ancestors 
• analogous relationships 

The picture above shows the wings of a bird, bat and insect, pterodactyl. Although these organisms have the same wing function the organisms do not share the same structure. This means that these wings are...

• homologous structures 
• analogous structures 
• common ancestors 
• not for flight 

In 2007 a devastating hurricane hit the Louisiana coast. The hurricane, named Katrina, devastated the plant and animal populations. No forms of natural selection would have increased the survival rates of these organisms.Since each organism had an equal chance for survival during the storm this natural disaster can be defined as what type of selection?

• genetic drift 
• natural selection 
• common selection 
• survival of the fittest 

What phrase should you think of when you hear, "survival of the luckiest?"

• natural selection 
• genetic drift 
• evolution 
• common ancestry 

what phrase should you think of when you hear the phrase, "natural selection?"

• survival of the luckiest 
• survival of the fittest 
• evolution 
• Genetic drift 

In the diagram above, the snail in the middle is displaying a different shell color. This difference in color is due to

• genetic drift 
• natural selection 
• genetic variation
• evolution 

A scientist studied a specific DNA segment from four different species. The table BELOW shows the DNA base sequence for each of four different species.
According to the results above, which two species are most closely related?

• 1 and 2
• 1 and 3 
• 1 and 4 
• 2 and 3

Organisms 1 and 4 must share ___________________ since they have similar DNA. 

• functions 
• protein shape 
• common ancestor 
• common habitat

If the  environment were to change dramatically or a new plant disease were to break out, which type of plant would most likely survive?

• Domestic Wheat
• Wild Wheat
• Domestic Corn 
• Wild Corn