Which London surgeon noted in 1775 that chimney sweeps exhibited frequent cancer of the scrotum?
A. Katsusaburo Yamagiwa
B. Sir Percivall Pott
C. Ernst Winder
D. John Hill
E. Richard Doll
Answer: B
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Which of the following is not a required characteristic of antigens from microbial pathogens that might be used in vaccine production?
A. It must be found in all strains of the pathogen. B. It must be excreted or found on the surface of the pathogen. C. It must be essential for the survival of the pathogen in the host. D. All of the choices are correct.
Sieve tube elements are components of the ____
a. ground tissue
b. phloem c. dermal tissue d. meristem e. xylem
In the phalarope, or wadepiper bird, the male is unusual in playing the larger parenting role -- he performs all the egg incubation and chick care. What unusual behavior might you predict for the female of the species?
A. The female provides sperm to fertilize the male's eggs. B. The female is part of a large harem of females, under the domain of a single male. C. The females compete to mate with the males, who choose among them. D. The females have dull, brown coloring that keeps them well-camouflaged. Clarify question: What is the key concept addressed by the question? What type of thinking is required? Gather Content: What do you already know about traditional roles of mate selection and parental investments? What other information is related to the question? Choose Answer: Given what you now know, what information is most likely to produce the correct answer? Reflection: Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
In an analysis of a new bacterial species, a microbiologist finds that the bacteria has an outer layer comprised primarily of proteins. This layer of proteins is known as a glycocalyx.
Answer the following statement true (T) or false (F)