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Ch26
quiz
11
Biology
Undergraduate 2
03/05/2013

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Cards

Term
Miller and other chemists showed that organic molecules such as amino acids and urea can only be produced by living organisms
Definition
False
Term
Most scientists classify all living organisms into thre domains: plants, animals, and bacteria.
Definition
False
Term
Which of the following was NOT present in the early atmosphere of earth?
Definition
Oxygen
Term
Based on their overall simple structure, viruses are assumed to be the evolutionary precursors of archaebacteria.
Definition
False
Term
Mitochondria appear to have originated via an endosymbiotic relationship between a red algae and a prokaryotic host cell.
Definition
False
Term
Early cells, or their chemical precursors, are thought to have been based on RNA, rather than DNA, in an early "RNA world"
Definition
True
Term
An oxygen-rich atmosphere did not exist on earth until photosynthetic bacteria, such as cyanobacteria, started producing oxygen as a by-product of photosynthesis
Definition
True
Term
Based on similarities of photosynthetic structures and genetic comparisons, multicellular land plants are thought to have evolved from green algae.
Definition
true
Term
Stromatolites are layered structures that result from growth of bacteria that collect sediments and minerals.
Definition
True
Term
Oxygen is thought to have first appeared in large concentrations in earth's atmosphere about 2 billion years ago. Which of the following must have occurred prior to this time?
Definition
The evolution of cyanobacteria and other photosynthetic bacteria.
Term
Which of the following makes classification and clarification of evolutionary relationships based on DNA analysis difficult
Definition
A) 
B) 
C) 
D) 
E) 
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