Basic Evolution

Darwin observed many different species of finches in the Galapagos Islands. What did Darwin conclude about the finches? 

• They evolved from a common ancestor
• They evolved from many different types of birds
• They all came from different countries and continents
• They developed from other types of organisms

Which statement best describes the process of evolution? 

• Populations can survive in different locations on Earth
• Environmental conditions limit the number of species on Earth
• Populations grow when resources are abundant
• The traits of species change over time.

Over many generations, populations of anteaters have developed longer tongues. Why might such a change occur? 

• Long tongues help anteaters escape from predators
• Anteaters with longer tongues can reach food sources other animals cannot reach
• Humans find long tongues more attractive in anteaters
• Anteaters with longer tongues require more food than those with shorter tongues 

Darwin observed and recorded data about many species of finches. According to Darwin, how did the food source on each island affect how the birds evolved? 

• Birds brought their favorite food with them to the island
• Birds beaks adapted to the food source on the island, survived, and reproduced.
• Birds changed food sources on the island to match their beaks.
• Birds ate only certain food sources, causing some foods to survive and others to die. 

Two populations have evolved into two species when...

• the populations are separated. 
• the populations look different. 
• the populations can no longer interbreed.
• the populations adapt. 

In a population of codfish, a scientist notes that some fish have larger or smaller fins than others. These differences among the traits of organisms in a population are known as:

• Variation 
• Extinction 
• Evolution
• Competition

Organisms with the most beneficial/ useful traits live long lives and reproduce. This is called ___________ of the _________.

• Survival of the Fittest
• Benefits of the Best
• Survival of the Living
• Survival of the Advantaged 

All of the following are evidence for evolution EXCEPT for:

• Similar developmental patterns
• Homologous structures
• Similarities in DNA
• Different genes

What is the importance of DNA in the human body?

• It moves materials into and out of the cell.
• It releases the energy stored in food so it can be used. 
• It carries the genes that determine inherited traits. 
• It is where the proteins that are need in the body are assembled. 

 A trait that helps an organism survive and reproduce is called a(n) _____________.

• Variation
• Adaptation
• Selection
• Species