Complement factors C5b+C6+C7+C8 make up a membrane attack complex that results in ______.
A. enhanced phagocytosis
B. opsonization
C. cytolysis
D. All of these choices are correct.
C. cytolysis
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A culture of E. coli bacteria is used to establish several subcultures. Each subculture is then plated and individulal colonies that grow on the agar plates are then tested for their sensitivity to the bacteriophage T1
There is a spectrum of sensitivities where some plates have a high number of resistant colonies and some plates had very few. This data supports which theory? A. Physiological adaptation theory B. Random mutation theory C. Both theories D. Neither theory
Which of the following organisms produce organic matter from inorganic molecules?
A. photosynthetic bacteria B. plants C. algae D. autotrophs E. All of the choices are correct.
Which fossil would be the oldest in a given strata and why? What will be an ideal response?
Pumice is a volcanic rock that floats in water. the density of pumice compared with water is
What will be an ideal response?