Discuss and compare the hypotheses for the evolution of viruses What will be an ideal response?
CONCEPTS TO CONSIDER: Celllular orgin hypothesis-transposon- plasmids - originally from
plant or animal cells -species specific ; Coevolution hypothesis - viruses appear before cells -
similarities protein structures of viral capsids -genetic similarities ; Regressive hypothesis -evolved
from small independent cells -lost genes that were not needed
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What type of thinking is required?
What will be an ideal response?
This phylum of nonvascular plants has about 100 known living species. They produce hornlike
sporophytes, and they are the only land plants whose chloroplasts contain alga-like protein bodies called pyrenoids.
a. Hepatophyta b. Pterophyta c. Bryophyta d. Lycophyta e. Anthocerophyta
When cells stop responding to normal controls over
growth and division they a. begin to form a tumor. b. produce a malignancy. c. start to die. d. kill surrounding cells. e. produce scar tissue.
Photosynthesis Photosynthesis
a) is NOT dependent on chlorophyll. b) does NOT involve oxidation-reduction reactions. c) produces water and carbon dioxide. d) produces glucose and oxygen. e) None of the answers are correct.