Lecture 9

Lecture 9 - Exam 1 Exams are mostly graded Mean score on...

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Exam 1 Exams are mostly graded Mean score on multiple choice was 75 Range was 62 – 95 Students did reasonably well on the multiple choice, but not as well on the short answer You will be given a chance to re-write your short answers. Half-credit is possible. Due by Friday evening
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Profound effects on organisms When sea level was lower, many organisms moved between land masses that are now isolated Distributions shifted according to advance and retreat of ice and changes in overall temperature, as habitats became available and unavailable Many species that were broadly distributed became isolated in separated areas (termed glacial refugia ) where favorable conditions persisted during glacial periods Pleistocene : Ecological consequences
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Woody vegetation provided three refuges for the grasshopper Chorthippus paralelus in Iberia (Spain), Italy, and the Balkans
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William D. Hamilton, Robert Trivers, and Social Theory Cooperation – Kin selection (explains confusing altruistic behaviors and eusociality) Conflict – parent/offspring, sibling, male/female
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The Diversity of Life: Prokaryotes (continued)
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Bacterial Groups (continued) Proteobacteria Delta : Include bioremediation agents ( Geobacter ) and other bacteria that are solitary predators ( Bdellovibrio
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This note was uploaded on 02/13/2011 for the course BIO 124 taught by Professor Dr.duran during the Winter '11 term at Drexel.

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Lecture 9 - Exam 1 Exams are mostly graded Mean score on...

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