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

Biology & Microbiology

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What type of thinking is required?

What will be an ideal response?

Biology & Microbiology

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.

Biology & Microbiology

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

Biology & Microbiology

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.

Biology & Microbiology