Ersc

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BROCK UNIVERSITY

Final Examination Course: ERSC 1F90 Date of Examination: April 21, 2011 Time of Examination: 19:00-22:00

Number of Pages: 7 Number of Students: 468 Examination Time: 3 hours Instructor: Hess

No examination aids other than those specified on the examination script are permitted. NO TEXTING!!! Use or possession of unauthorized materials or use of any device other than those specified will automatically result in the award of a ZERO GRADE for this examination. This means you should not have your mobile device out for ANY REASON!!!

1. 2.

Answer ALL questions on the provided SCANTRON sheet. Please use a pencil. Turn in the question sheet AND SCANTRON sheet at the end of the examination.

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Name ________________________

-P~.d.
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

as +

1. The positive feedback mechanism in which a population falls below a threshold level, mutations proliferate due to reduced genetic diversity, and the population is further reduced is called: A) inbreeding depression B) toxic genetics C) environmental resistance D) dieback
2. About how much solar radiation is reflected back by the atmosphere of our planet? A) 25% B) 85%

C)3%
D) 5% 3. The correct order for layers of the atmosphere, from the top to the ground surface, is as follows:

A) thermosphere, stratosphere, mesosphere, troposphere B) troposphere, stratosphere, mesosphere, thermosphere C) thermosphere, mesosphere, stratosphere, troposphere D) stratosphere, mesosphere, troposphere, thermosphere
4. What classification dominates the population of organisms on Earth today?

A) arthropods B) mammals C) plants D) nematodes
5. Greater species diversity is observed near the low latitudes compared to regions closer to the poles. The term for this is: A) poleward genetic drift B)…...

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