Echinoderm larvae are ________________, while echinoderm adults are ________________.
a. radially symmetrical; bilaterally symmetrical
b. bilaterally symmetrical; radially symmetrical
c. aquatic; terrestrial
d. segmented; unsegmented
e. gastropods; bivalves
Ans: b. bilaterally symmetrical; radially symmetrical
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Which nonlactose-fermenting organism, that rarely causes human infection, grows poorly at 35°C; however, grows optimally between 20°C and 25°C?
a. Psychrobacter pulmonis b. A. xylosoxidans c. R. radiobacter d. S. putrefaciens
The above figure is of __________
a. Arthrobotrys. b. a parasitic fungus. c. a fungus attacking a nematode. d. a sac fungus. e. all of these.
The vital capacity is indicated by
a. A + D. b. A + D + E. c. C + E. d. A + B + D. e. A + C + D.
What do we call a lymphocyte that has never encountered an antigen?
A. Stem leukocyte B. Foreign lymphocyte C. T cell D. B cell E. Naive lymphocyte