Which of the following cell envelopes is found in all bacteria?
A. Cell membrane
B. Cell wall
C. Outer membrane
D. All of the above
Answer: A. Cell membrane
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The surface layer of the skin is the
A. cutaneous. B. keratin. C. dermis. D. epidermis.
In a certain breed of chicken, two genes control color. A dominant allele (I) inhibits the expression of
any color gene (C). A second recessive gene (c) results in albinism when homozygous (cc). Give the F2 phenotypic ratio of a colored chicken ii CC with a white II cc. What will be an ideal response?
What is one goal of the Human Microbiome Project?
A. To sequence the DNA of all microorganisms B. To study the prevalence of disease C. To elucidate genetically linked diseases D. To study microorganisms in an artificial habitat E. To provide comprehensive characterization of microbiota relating to human health and disease
Sedimentation of sludge occurs in
A) anaerobic sludge digestion. B) primary sewage treatment. C) secondary sewage treatment. D) tertiary sewage treatment. E) water treatment.