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

Biology & Microbiology

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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

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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.

Biology & Microbiology

Which fossil would be the oldest in a given strata and why? What will be an ideal response?

Biology & Microbiology

Pumice is a volcanic rock that floats in water. the density of pumice compared with water is

What will be an ideal response?

Biology & Microbiology