Question 5 (9 points) In 5-7 sentences, briefly define evolution and natural selection (4) then analyze the differences between the two concepts (5).
Don't forget to use complete sentences and proofread your answer.

plasma - state of matter made up of electrically charged particles

the population of unionid mussels in the hudson river decreased after zebra mussels were introduced. zebra mussels, a nonnative species, competed with the unionid mussels for food. the zebra mussels were able to outcompete the unionid mussels, allowing the zebra mussel population to increase dramatically over six years. the unionid mussel population decreased due to a lack of food.

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