Which of the following tests can be performed to differentiate the two subspecies of Neisseria elongata and glycolytica?
a. Catalase
b. Nitrate reduction
c. DNase
d. Growth in nutrient broth
A
The catalase test can be performed to differentiate N. elongata subsp. elongata, which is cata-lase-negative, and N. elongata subsp. glycolytica, which is catalase-positive.
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If 100 females produce 50 offspring, the age specific fertility rate is
A. 0.75. B. 0.5. C. 2. D. 50. E. impossible to calculate with this information.
The immunological reaction that occurs when there is an optimal ratio of antigen and antibody, producing a lattice at the zone of equivalence is known ________.
A. immunodiffusion B. immunoprecipitation C. immunoblotting D. immunoelectrophoresis
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Answer the following statement true (T) or false (F)
Roots exhibit negative gravitropism whereas stems exhibit positive gravitropism.
a. true b. false