Compare and contrast Type I and Type III survivorship curves. Sketch a correctly labeled graph to

support your comparison. BONUS: Identify two organisms that represent each of the two types of
survivorship strategies discussed here. What will be an ideal response?


The sketch should resemble Fig. 53-8 on textbook p.1163. Both curves deal with the point in the life
cycle when most mortality occurs. In a Type I curve (exemplified by bisons and humans), the
probability of surviving is high early in life. In a Type III curve (exemplified by herring gulls early in
life and also oysters), the probability of surviving is high later in life.

Biology & Microbiology

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Gliding motility can be used to propel bacteria ________.

A. along the framework of the cytoskeleton of host cells B. through the air only C. through liquids only D. across solid substrates only

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Lakes with elevated dissolved nutrients and low water clarity are called ______.

A. lotic B. oligotrophic C. eutrophic D. adibiatic E. headwaters

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What was the purpose of the Artemia slide prepared with droplets of

What will be an ideal response?

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During a systemic acquired resistance response, a plant ________

a. shelters nitrogen-fixing bacteria b. releases protective organic compounds c. folds leaves to minimize evaporation d. walls off wounds

Biology & Microbiology