A smear from a mixed culture of bacilli and cocci is stained with the acid-fast procedure. This is an image of the stained smear at 1000X total magnification. Which of the bacteria, if any, are acid-fast?
A. The cocci are acid fast
B. Neither the bacilli nor the cocci are acid-fast.
C. Both the bacilli and cocci are acid-fast
D. The bacili are acid fast
Ans: D. The bacili are acid fast
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The site of anaerobic ammonia oxidation in the recently described genera Brocadia, Kuenenia, Scalindua, and Anammoxoglobus is called the ________.
Fill in the blank(s) with the appropriate word(s).
Which of the following is a reason to graft
plants?
a. to maintain the quality of a plant b. to increase the hardiness of a plant c. to avoid plant diseases d. to produce seedless fruits e. all of these are reasons to graft plants
External respiration
a. moves carbon dioxide from alveoli into the blood. b. moves oxygen from alveoli into the blood. c. moves oxygen from the blood into alveoli and carbon dioxide in the opposite direction. d. moves oxygen from alveoli into the blood and carbon dioxide in the opposite direction. e. moves both oxygen and carbon dioxide from alveoli into the blood.
Eukaryotic cell nuclei contain genes that are
a. primarily of eukaryotic origin. b. primarily of archaebacterial origin. c. partly archaebacterial and partly eubacterial in origin. d. derived from neither archaebacterial nor eubacterial cells.