If a T cell is exposed to a "hidden" antigen, what kind of immune reaction will result?
A) an autoimmune disease
B) a delayed hypersensitivity reaction
C) a cytotoxic hypersensitivity reaction
D) allergic contact dermatitis
E) an allergy
A
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You notice that in your aquarium, previously full of undoubtedly male fish, one is laying eggs. Upon a bit of research, you find out that the species of fish you purchased is a sequential hermaphrodite. Which of the following is true?
A. One of the male fish underwent protandry and became a female. B. One of the male fish fertilized its own eggs. C. Since the fish are hermaphrodites, one of the male fish laid eggs and another will likely fertilize them. D. The fish have parthenogenesis, therefore their eggs do not have to be fertilized to be viable. E. The fish have protogyny, which allows the males to lay eggs. 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 different reproductive strategies? 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? 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?
Nonvascular plants
A. include ferns. B. do not have true stems, leaves, or roots. C. contain xylem or phloem. D. are found in dry habitats.
Cell-mediated immunity in part protects against __________.
A) normal cells of the host, producing the cell-mediated immunity B) bacteria free in body fluids C) intracellular bacteria and viruses D) viruses free in body fluids E) toxins
Which body system is mainly affected by Creutzfeldt-Jakob disease?
A. genitourinary system B. nervous system C. respiratory system D. circulatory system E. digestive system