Chapter 1.3 Assessment

question

[1.A.] List the characteristics that define life.
answer

All made up of basic units called cells, based from a universal genetic code, obtain and use materials and energy, grow and develop, reproduce, respond to their physical environment, maintain a stable internal envrionment, and change over time.
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[1.B.] Suppose you feel hungry, so you reach for a plum you see in a fruit bowl. Explain how both external and internal stimuli are involved in your action.
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The external stimulus in action here is your sense of sight; the internal stimulus in action here is hunger.
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[2.A.] What are the themes in biology that come up again and again?
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The cellular basis of life; information and heredity; matter and energy; growth, development, and reproduction; homeostasis; evolution; structure and function; unity and diversity of life; independence in nature; and science as a way of knowing, are all the \”big ideas\” of biology.
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[2.B.] Suppose you discover a new organism. What would you expect to see if you studied it under a microscope?
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You would expect to see cells, whether it was a multicellular organism or not.
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[3.A.] At what level do biologists study life?
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From the molecular level to a planetary level.
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[3.B.] A researcher studies why frogs are disappearing into the wild. What field of biology does this research fall into?
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Global ecology.
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[4.A.] Why do scientists use a common system of measurement?
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Due to the fact that scientists review and evaluate other scientists’ experiments, there needs to be a system of measurement they all use and understand. This makes it practical.
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[4.B.] Suppose two scientists are trying to perform an experiment that involves dangerous chemicals. How might their safety be affected by not using a common measurement?
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They could make incorrect conversions from the common measurement system and therefore incorrectly execute the experiment. This incorrect execution of the experiment could possibly harm them.

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