Endospores represent a challenge to the fields of industrial and medical microbiology because
A. endospores are significantly smaller than vegetative cells.
B. endospores are resistant to harsh environments, thus allowing survival of endospore-forming organisms under conditions in which non-endospore-forming cells would not survive, and endospore-forming organisms are often dangerous pathogens.
C. they are resistant to harsh environments, thus allowing survival of endospore-forming organisms under conditions in which non-endospore-forming cells would not survive.
D. endospore-forming organisms are often dangerous pathogens.
Answer: B
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The process of sporangium formation and endospore maturation requires 6-8 hours. What is most likely to result if the temperature of the environment was raised to 100°C about 2 hours after the process started?
A. The endospore would not form properly because it is not yet heat resistant. B. The chromosome in the endospore would likely carry mutations. C. The organism would be termed a hyperthermophile. D. The endospore would form more slowly and be heat resistant. E. The endospore would form properly but would be unable to germinate.
Darwin was probably influenced most by which of the following when developing his theory of
evolution?
a. Scala Naturea b. Catastrophism c. Uniformitarianism d. Taxonomy e. Vestigial structures
Gastrulation producesa(n) ____
a. hollow balls of cells b. embryo with germ layers c. solid balls of cells d. haploid cells e. yolk sac
____________________ is a condition characterized by increased mucus secretions in the bronchioles. Fill in the blank(s) with the appropriate word(s)