U5Q3 Evolution

The scientific theory of evolution is supported by different types of evidence. The diagrams below show the skeletons of two different animal species. How does comparing the skeletons of these animals provide support for the scientific theory of evolution?

•  It provides information about the organisms' habitats.
•  It shows possible common ancestry between organisms.
• It provides information to determine the organisms' ages.
• It shows possible chromosomal similarities between organisms.

According to fossil records, the horses that lived 50 million years ago were much smaller, weaker and slower than modern horses. Which process is most likely responsible for the changes that have led to the increased size, strength, and speed in horses?

• commensalism
• inbreeding
• migration
• evolution by natural selection

What can help a scientist know the approximate age of bones?

• the soil it is found in
• the index fossils in the area
• the type of rock it is formed in
• absolute dating

When a layer of rock cuts through the other layers

• the layer that cut through is younger than the layers it cuts through
• the layer at the bottom is younger
• the layers are the same age
• the index fossil is destroyed

Charles Darwin came up with this theory 

• Natural Selection
• Mutation

To adjust to a changing environment

• Mutation
• Adapt

Darwin wrote that organisms with traits that are best suited to the environment will ________________

• increase in number
  
• become extinct
  

Another word for adapt is ____________.

• change
• create

What characteristic did Darwin observe about the finches on the Galapagos Islands?

• Their feathers 
• Genotypes 
• Their beaks
• Their body sizes

Two organisms that are closely related would have

• very similar DNA sequence
• exactly the same DNA sequences
• no proteins in common
• completely different DNA sequence