Which of the following statements about natural killer cells is FALSE?
A) They destroy virus-infected cells.
B) They destroy tumor cells.
C) They destroy cells lacking MHC I.
D) They are stimulated by an antigen.
E) None of the answers are correct; all of these statements are true.
D
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A muscle precursor cell expressing the MyoD1 gene would be considered to be
A. pluripotent. B. determined. C. differentiated. D. totipotent. 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 determination and differentiation? Consider Possibilities · Consider the different answer options. Which can you rule out? 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?
Which subatomic particles are found outside the nucleus of an atom?
a. Neutrons b. Protons c. Electrons d. Photons
Which of the following hormones stimulates uterine contractions during the birth process in mammals?
A. oxytocin B. chorionic gonadotropin C. FHS D. LH E. testosterone
A flower
A. is the sexual reproductive organ. B. may contain male and female reproductive parts. C. serves to attract animal pollinators. D. is composed of whorls of modified leaves. E. All of the choices characterize flowers.