PNB 2250 Exam 1 (final exam prep)
Study Guide
cell to cell connection (in animals vs. plants) - Answer-plants = plasmodesmata,
flow of nutrients between cells
animals = tight junctions
convergent evolution - Answer-organisms independently evolve similar traits as a
result of having to adapt t...
major diversification of animal structure/function
unknown cause
possible causes of Cambrian Explosion - Answer✔✔-hyperopia
massive glaciation
volcanism
volcanism - Answer✔✔-movement of mantle elements into the biosphere
mass extinction - Answer✔✔-end of Devonian Period
once it occurs, largest vertebrates are lost
smaller might have meant better fitness for survival
reasons for rapid rate of evolution - Answer✔✔-accelerated after mass extinctions
predator, prey interactions
very large energy sources (phytoplankton)
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