Evolution 3

How are mutations a mechanism for evolution?

• They allow a species to decide to change their DNA and change their allele frequency
• They are a random change in the DNA of a species that changes their allele frequency
• Mutations are not real.

Which of the following is an example of a vestigial structure?

• the wings of a red-tailed hawk
• the hind limbs of a house cat
• the fins of sharks
• a pelvis bone in a whale

What is suggested by the similarity of early embryos of different species of vertebrates?

• no evolutionary relationships between the groups
• recent common ancestry
• similar environments in the past
• evolution from a distant common ancestor

An inherited characteristic that increases an organism's ability to survive and reproduce in its specific environment is called a/an

• vestigial structure
• adaptation
• speciation
• analagous structure

What do we call similar physical structures that indicate a link to a common ancestor?

• absolute dating
• adaptations
• gradualism
• homologous structures

The preserved remains or physical evidence of an organism that lived in the past are called...

• evolutionary features
• fossils
• mutations
• variations

What most likely caused the finches on the Galapagos Islands to have beaks that were differnt from the finches living on the South American mainland?

• They were different types of food available on the island.
• The finches on the islands had to drink salt water.
• There were different types of predators living on the island.
• The finches on the mainland built different types of nests.

What is it called when an organism is best adapted to its environment, it will survive and reproduce more successfully than other organisms less adapted?

• cloning
• evolution of all species
• natural selection
• selective breeding

The gradual change in species over time is...

• Evolution
• Nucleotide 
• Adaptation
• Natural Selection

Genetic differences between organisms of the same species

• Variation
• Adaptation
• Behavior
• Environment