Photosystem I and photosystem II are part of
A. the light reactions and the carbon reactions.
B. the light reactions only.
C. the light reactions and respiration.
D. the carbon reactions only.
E. respiration.
B. the light reactions only.
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The source of variation among microorganisms that were once identical is
A. antibiotic resistance. B. virulence factors. C. sigma factors. D. mutation.
The DNA molecule could be compared to a
a. hairpin. b. ladder. c. key. d. globular mass. e. flat plate.
Oxpeckers have long been thought to have a mutualistic relationship with cattle in Zimbabwe, whereby the birds remove ticks from the backs of cattle, and the cattle benefit due to the removal of parasitic ticks
The observational experiments of Weeks (2000 ) in Zimbabwe demonstrated that the relationship between oxpeckers and cattle was not mutualistic, but in fact parasitic. What two oxpecker behaviors did Weeks observe?
The first disease to be identified as being caused by a virus was tobacco mosaic disease.
Answer the following statement true (T) or false (F)