Which of the following is considered a likely explanation for the events of the Cambrian explosion?
A) Complex predator-prey relationships and increased atmospheric oxygen levels promoted animal diversification.
B) A great surge of volcanic activity was triggered by significant movements of the continental plates and possibly by an asteroid impact.
C) Solar flares led to increased UV radiation intensity, which in turn promoted a high rate of mutation. This led to rapid diversification of animals.
D) The massive growth of swamp vegetation depleted the atmosphere's carbon dioxide and eventually cooled the Earth's climate.
Answer: A
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A) sporopollenin B) lignin C) chlorophyll a D) cellulose E) chlorophyll b
Members of the lineage ____ include slugs and snails. Most have a shell, but some have no shell. Most
undergo torsion during development, a twisting of their visceral mass that leads to placement of their anus practically over their heads.
a. Cephalopoda b. Polyplacophora c. Bivalvia d. Gastropoda e. Scaphopoda
Why are viruses not considered to be alive? What will be an ideal response?
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