A 33-year-old soldier has recent weight loss, night sweats, fever, and cough. Results of a PPD (Tuberculin) test show redness and swelling at the site of injection. Radiograph results of the chest show bilateral upper lobe involvement and mediastinal and hilar lymphadenopathy. Which of the following describes the microbe causing this disease?
A. Acid-fast staining filamentous bacteria
B. Acid-fast staining bacillus
C. Gram-negative bacillus
D. Gram-staining bacillus
Ans: B. Acid-fast staining bacillus
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Cell division in the apical meristems at the tips of a plant that results in increases in height or length is called
A. primary growth. B. secondary growth. C. vascular cambium growth. D. mitotic growth. E. herbaceous growth.
Which of the following species can be considered exotic in North America?
a. sea lamprey b. water hyacinth c. nutria d. all of the choices
Which of the following were early tetrapod
innovations?
a. limbs evolved from lobed fins b. pulmonary circulatory system c. inner ear changes to detect airborne sounds d. eyelids e. all of these were early tetrapod innovations
What unit of measure is most appropriate for expressing the size of bacteria?
A. nanometer B. picometer C. milimeter D. micrometer