Quiz 2 - Quiz#2 The first living organisms were most likely...

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Quiz #2 The first living organisms were most likely aerobic prokaryotes. Answer:  True False  Correct Marks for this submission: 1/1. Question 2  Some species of  Anopheles  mosquito live in brackish water, some in running fresh water,  and others in stagnant water. What type of reproductive barrier is most obviously separating  these different species? Choose one answer.  a. habitat isolation  b. temporal isolation  c. behavioral isolation  d. gametic isolation  e. postzygotic isolation  Question 3  In which of the following groups has sympatric speciation been most important?  Choose one answer.  a. fungi  b. protozoa  c. bacteria  d. plants  e. animals  Question 4 
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Quiz #2 What condition would have made the primitive atmosphere of Earth more conducive to the  origin of life than the present one? The primitive atmosphere Choose one answer.  a. had a layer of ozone that shielded the first fragile cells.  b. removed electrons that impeded the formation of protobionts.  c. may have been a reducing one that facilitated the formation of complex substances from  simple molecules.  d. had more oxygen than the modern atmosphere, and thus it successfully sustained the first  living organisms.  e. had less free energy than the modern atmosphere, and thus newly formed organisms were  less likely to be destroyed. 
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This note was uploaded on 05/08/2010 for the course BIOL 1202 taught by Professor Gregg during the Spring '08 term at LSU.

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Quiz 2 - Quiz#2 The first living organisms were most likely...

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