Which of the following statements is incorrect about hepatitis A?
A. Havrix is an inactivated vaccine for prevention.
B. An infection predisposes a person for liver cancer.
C. Immune globulin therapy helps decrease the severity.
D. It is transmitted by the oral-fecal route.
E. The virus produces flu-like symptoms with discomfort near the liver and darkened urine.
Answer: B
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Consider the cladogram shown. Based on this cladogram, which species has the greatest number of ancestral character states?
A. 1
B. 2
C. 3
D. 4
E. 5
Clarify Question
· What is the key concept addressed by the question?
· What type of thinking is required?
· What key words does the question contain and what do they mean?
Gather Content
· What do you already know about cladistics?
Consider Possibilities
· What other information is related to the question? Which information is most useful?
Choose Answer
· Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer?
Reflect on Process
· 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?
Restriction endonucleases break ____ bonds
a. phosphodiester b. ester c. glycosidic d. peptide e. hydrogen
Most plant cells are pluripotent, meaning that they
a. constantly switch tissue types throughout their lives. b. cannot change after differentiating into a specific cell type. c. end up as a hybrid of tissue types. d. can function in any environmental condition. e. retain the ability to change cell types when necessary.
The cellular branch of adaptive immunity
A) is organized by T cytotoxic cells and carried out by T helper cells. B) does not involve a memory function. C) is based on antibody production. D) is organized by T helper cells and carried out by T cytotoxic cells. E) is based on the activity of both T and B cells.