Autoimmune disorders are caused by ____

a. lymphocytes that target "self" cells
b. B cell activation
c. impaired innate immunity function
d. T cell activation
e. the inability to make antibodies


ANSWER: a

Biology & Microbiology

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A mutualism in which each species can live without the other is termed

A. a facultative mutualism. B. an obligate mutualism. C. a trophic mutualism. D. a dispersive mutualism. E. a defensive mutualism.

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The defining trait of hominins is

a. large brain. b. shoulder that can rotate 360 degrees. c. bipedalism. d. extended care of young. e. nails on fingers and toes

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The cross section in Figure 31-6 is representative of the internal structures found in:


A. phoronids.
B. nemerteans.
C. Diplopoda.
D. Polyplacophora.
E. oligochaetes

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If Hypothesis 1 (traits are linked) had been correct, what offspring ratios would Mendel have predicted in the F2 generation?

A: All round yellow B: 3 round yellow: 1 wrinkled green C: 3 round green: 1 wrinkled yellow D: 9 round yellow: 3 round green: 3 wrinkled yellow: 1 wrinkled green

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