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SAMPLE TEST QUESTIONS: o Example of a "multiple choice" question (0-5 correct answers) (5 @ 5 points each) Circle A B C D E &endash; 1. Multicellular animals evolved and diversified into the major lineages (phyla) seen today: A. Somewhere between a million and 500,000 years ago. B. Somewhere between a billion and 500 million years ago. C. Following the greatest mass extinction of all time at the end of the Paleozoic. D. Probably from a colonial flagellate ancestor. E. Before they developed hard shells that are well represented in the fossil record. o Answers B, D, E are correct
o Example of a "short essay" question (2 @ 15 points each) &endash; Describe what a zooxanthella is and what the relationship of a zooxanthella to a coral is, including where the zooxanthella lives and how the coral and zooxanthella each benefit or are harmed. o Answer that would get full credit: &endash; A zooxanthella is a symbiotic dinoflagellate that lives inside the cells of a coral. The zooxanthellae releases organic compounds that coral uses for food and enhances calcification [or skeletal growth] of the coral. The coral provides N and P as waste products which the zooxanthella can use, and protects the dinoflagellate from grazing.
o Example of a "fill in the blank" question (10 @ 2 points each) &endash; A large proportion of the world's described species belong to what group? ________________. o Potential correct answers: &endash; insects, arthropods, or protostomes
o Example of a "short answer" question (5 @ 5 points each) &endash; How are boring organisms (no pun intended) related to the development of high species diversity on the world's coral reefs? o Correct answer: &endash; They provide 3-dimensional microenvironments that favor small organisms with rapid evolution.
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