Proteins produced by Escherichia coli can prevent the growth of pathogenic bacteria such as Salmonella and Shigella. This is an example of _________________________.

A) Microbial association
B) Microbial inhibition
C) Microbial antagonism
D) Microbial immunity
E) Microbial resistance


C) Microbial antagonism

Biology & Microbiology

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Four elements make up more than 96% of the mass of most living organisms. Which of the following

is NOT one of those four elements?

a. sodium b. carbon c. oxygen d. nitrogen e. hydrogen

Biology & Microbiology

All EXCEPT which of the following statements

about Neandertals is true? a. The oldest Neandertal fossils are 200,000 years old. b. They lived in Europe and the Near East. c. Neandertals are direct ancestors of Homo sapiens. d. Neandertal brains were larger than those of modern humans. e. They have no modern descendents.

Biology & Microbiology

Explain the relationship between carrying capacity and limiting factor in regard to population growth. Relate this to

the S-shaped logistic growth curve. What will be an ideal response?

Biology & Microbiology

A lacOC mutation is

A) constitutive. B) cis-dominant. C) incompletely dominant. D) codominant E) recessive.

Biology & Microbiology