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1 A. a single cell organism B. a string of Mitochondrial DNA C. non-hereditary traits such as learned behaviors D. a hereditary unit consisting of a sequence of DNA Which of these is the correct definition for a gene?

1 D. a hereditary unit consisting of a sequence of DNA Home Which of these is the correct definition for a gene?

2 A. camouflage B. mimicry C. instinct D. hibernation Some birds fly south for the winter. Birds know when and where to fly because of —

2 C. instinct Home Some birds fly south for the winter. Birds know when and where to fly because of —

3 A. a bird building a nest B. a turtle burying its eggs C. a bear hibernating in winter D. a horse pulling a plow Which of these is not an instinctive behavior?

3 D. a horse pulling a plow Home Which of these is not an instinctive behavior?

4 Which of these is being described in the passage? A. gene display B. inherited traits C. learned behaviors D. nature versus nurture Karen has two sisters and one younger brother. Her parents and grandmother also live with her. She is the only blonde in her family. However, everyone in her family has brown eyes.

4 Which of these is being described in the passage? B. inherited traits Home Karen has two sisters and one younger brother. Her parents and grandmother also live with her. She is the only blonde in her family. However, everyone in her family has brown eyes.

5 A. the ability to speak in front of a crowd B. having green eyes and brown hair C. mastering multiplication tables D. becoming an extrovert Which of these are characteristics of inherited traits?

5 B. having green eyes and brown hair Home Which of these are characteristics of inherited traits?

6 A. instinct B. hibernation C. camouflage D. learned behavior Smelts are fish that lay their eggs in the sand on beaches. When the eggs hatch, the babies know to go to the water. This is an example of —

6 A. instinct Home Smelts are fish that lay their eggs in the sand on beaches. When the eggs hatch, the babies know to go to the water. This is an example of —

7 A. They do different activities. B. They eat different types of food. C. They inherit their ear length from their parents. D. They inherit their ear length from their children Which BEST explains why some dogs have longer ears than others?

7 C. They inherit their ear length from their parents. Home Which BEST explains why some dogs have longer ears than others?

8 A. A cow flicking away a fly with its tail. B. A baby whale drinking milk from its mother. C. A cat closing its eyes when it sleeps D. A dog scratching the door to be let outside Which is a learned behavior?

8 D. A dog scratching the door to be let outside Home Which is a learned behavior?

9 A. your taste in clothing B. your favorite music C. your eye color D. All of the above Which of the following are traits that you probably inherited?

9 C. your eye color Home Which of the following are traits that you probably inherited?