Which of the following organisms is currently considered one of the primary photosynthetic organisms in the oceans?
A. green algae
B. cyanobacteria
C. diatoms
D. red algae
E. None of the answers options is correct.
C
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In an agar dilution tube, microbial colonies grow
A) at the bottom of the tube. B) on the sides of the tube, although some may be at the surface. C) embedded in the agar, rather than growing on the surface. D) on the surface, but some creep down the sides away from the surface.
Which type of media is designed to distinguish microorganisms on the basis of certain growth characteristics?
a. Selective b. Nutritive c. Differential d. Definitive
The main antigen presenting cells of the body are:a
macrophages and B cells only. b. macrophages and dendritic cell only. c. dendritic cells and B cells only. d. dendritic cells and plasma cells only. e. macrophages, B cells and dendritic cells.
In a market economy, a supply restriction occurs when a single firm monopolizes a market
a. true b. false