Evolution

Which types of organisms developed first due to the early environmental conditions on Earth? A prokaryotic and aerobic  B prokaryotic and anaerobic C eukaryotic and aerobic  D eukaryotic and anaerobic

• prokaryotic and anaerobic
• prokaryotic and aerobic
• eukaryotic and aerobic
• euikaryotic and anaerobic

A large population of ants was sprayed with an insecticide. A few of the ants survived and produced a population of ants that was resistant to this spray. What can best be inferred from this example? 

• Individuals with favorable variations survive and reproduce.
• The environment has no effect on the survival of an organism.
• Insecticides cause mutations that are passed on to the next generation. 
• A species will adapt no matter what the environment. 

Which will most likely cause variations to occur within a species? 

• Competition
• Mutation
• Mutualism
• Predation

In which populations does genetic drift most often occur? 

• in small populations
• in large populations
• in marine populations
• in terrestrial populations

Species C and D share similarities in DNA sequences. What would this suggest about their evolutionary relationship? 

• Species C developed before species D
• Species C and D share a recent common ancestor.
• Species C and D are unrelated
• Species C developed before Species D

A researcher sprays a new pesticide on thousands of insects of the same species that live in a large field. A few of the insects survive.  What can be concluded by the researcher? 

• The species of insects will likely become resistant to the pesticide.
• The ideal interval between the first and second applications of the pesticide should be increased.
• The pesticide has no effect on the species.
• The concentration of the pesticide was too weak.

This diagram represents the bone structures of the front limbs of four different animals.  What do the similarities of the structures suggest about these organisms? 

• They grow at the same rate.
• They evolved from a common ancestor 
• They live for the same length of time.
• They live in the same environment.

Natural selection is described as “survival of the fittest.” Organisms considered fit will survive to accomplish which? A.  

• migrate to other areas 
• reproduce and pass on genes 
• have a larger territory 
• have more genetic mutations 

Which fact provides the best evidence for the theory that mitochondria and chloroplasts evolved from free-living cells?  

• Mitochondria and chloroplasts are about the same size as bacteria. 
• Mitochondria and chloroplasts carry their own DNA. 
• Mitochondria and chloroplasts perform the same function. 
• Mitochondria and chloroplasts look like bacteria.

Which best describes the first unicellular organisms on Earth? 

• aerobic and eukaryotic 
• aerobic and prokaryotic 
• anaerobic and eukaryotic
• anaerobic and prokaryotic