Scin130 Midterm

Lyle is a researcher who studies the way in which the muscles work together in superb athletes. What is he studying?

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| A. Organs. | |

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| B. Molecules. | |

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| C. Cells. | |

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| D. Organ system. | |

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| E.  Tissues. | |

Gino was an ecologist studying energy flow through an ecosystem. Which of the following might he most likely classify as a producer?

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| A. Maple tree. | |

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| B. Snake. | |

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| C. Mouse. | |

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| D. DNA. | |

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| E. Fungus. | |

Celine was studying the evolution of the long neck in the giraffe. Which of the following is an example of natural selection?

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| A. Fossil evidence shows that long-necked giraffes are descendents of short-necked giraffes. | |

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| B. Among early giraffes were some with long necks, and these animals thrived well, leaving more offspring than short-necked animals. | |

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| C. Early giraffes recognized that they needed longer necks to reach more leaves, so only the longest-necked animals reproduced. | |

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| D. Each generation of giraffe reached higher as leaves became more scarce, lengthening the neck. | |

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| E. Fossil evidence show that long-necked giraffes arose more recently than did short-necked giraffes. | |

Karen is a biology student employed to count American red squirrels. What is she counting?

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| A. Communities. | |

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| B. Ecosystems. | |

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| C. Species. | |

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| D. Populations. | |

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| E. Organisms. | |

Dylan was a football player who suffered traumatic injuries. He required a surgical operation in which the surgeon would be repairing his stomach and intestine. What category of structure would the surgeon be dealing with inside Dylan’s body?

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| A. Single tissue | |

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| B. Single organism | |

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| C. Single organ | |

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| D. Organ system | |

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| E. Single cell | |

Henri tested the effects of a...