If an environment is changed by disruption, a different climax community always establishes. Indicate whether the statement is true or false
ANS: F
A completely new climax community establishes in an environment only if there is a disruption that
permanently altered an area. Information can be found in the section Marine Communities Change as
Time Passes.
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It is clear that a heavy dose of pesticides or other toxic pollutants can kill species. However, chronic exposure to pollutants seems to cause recent high mortality in marine mammals by
A. Causing weakened immune systems and increased vulnerability to infection B. Direct bioaccumulation of the chemicals, such as lead, in their tissues C. Killing off the prey species that they depend on for food D. Eventually killing them E. Decreasing the plants that are normally in their environment, such as kelp, that they use for shelter
Australia and New Zealand are described as at the "opposite side of the world" from England. If London's centroid coordinates are 51.5O N 0.13O E, and the coordinates for Wellington, NZ are 41.3O S 174.8O E, we can conclude
A. that the statement is false since the antipode of London is in the Indian Ocean. B. that the statement is fairly accurate, but not precise. C. that Wellington really is the exact antipode of London. D. that if you dug a hole straight down from London, you would come out in China.
The nation with the greatest percentage of global proven oil reserves is A) Saudi Arabia B) Venezuela C) Canada D) Iran E) Iraq 156) 33
A) Saudi Arabia
B) Venezuela
C) Canada
D) Iran
E) Iraq
Why do westerly winds prevail at upper altitudes?
A) absence of friction B) rotation of the earth and equator to pole temperature contrast C) rotation of the earth D) equator to pole temperature contrast E) lower air density