Cancer affects
A) humans only.
B) unicellular organisms only.
C) multicellular organisms only.
D) multicellular and unicellular organisms.
Ans: C) multicellular organisms only.
You might also like to view...
Other microorganisms besides coliforms that have been used as indicators of fecal contamination may be
A. Clostridia. B. Enterococci. C. bacteriophages. D. Bacteroides. E. Clostridia, Enterococci AND bacteriophages
Which of the following branches of biology examines the form and variety of organisms in their
natural environment?
a. Taxonomy b. Natural history c. Comparative morphology
d. Biogeography e. Geology
Many tropical ferns live on other plants without withdrawing nutrients from them. These ferns are said to be ____
a. epiphytes
b. bryophytes c. parasites d. pathogens e. saprophytes
Please match the virulence factor of Streptococcus pyogenes to its description.
Capsule A) Surface antigen that serves as the basis for alphabetical grouping; protects bacterium from lysozyme B) Toxin that causes beta-hemolysis on blood agar and injures cells of the host C) Enzyme that plays a role in invasion by leading to the digestion of fibrin clots D) Projecting surface antigen that facilitates adherence and resists phagocytosis E) Chemical surface layer that prevents an immune response by the host F) Enzyme that promotes invasion into tissues by breaking down the binding substance in connective tissues