Which of the following are adhesins?

A. Endotoxins
B. Pili
C. Siderophores
D. Cilia
E. Flagella


Answer: B. Pili

Biology & Microbiology

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Peter Sheldon found that the number of “ribs” in which of the following groups changed over a 3

million year period with no evidence of speciation?

a. horses d. humans b. trilobites e. octoprocts c. insects

Biology & Microbiology

Describe how the discovery of the structure of DNA is an example of the fact that science is a process that always builds on previous work. Text Section LO2 Key Concept: Watson and Crick, process of science, DNA structure Level: Application of concepts (maybe some advanced critical thinking)

What will be an ideal response?

Biology & Microbiology

A soil that is 10% silt, 80% sand, and 10% clay would be considered

A) clay loam. B) sandy clay. C) slit loam. D) loamy sand.

Biology & Microbiology

Which of the following is an example of Scala Naturae?

a. Darwin's ladder-like understand of nature from the most complex to simplest b. Darwin's ladder-like understand of nature from simplest to the most complex c. Aristotle's ladder-like understand of nature from the most complex to simplest d. Aristotle's ladder-like understand of nature from simplest to the most complex

Biology & Microbiology