Lignin is an important component in
A) tight junctions.
B) plant cell walls.
C) fungal cell walls.
D) plasmodesmata.
E) bacterial cell walls.
Answer: B
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The terms pathogenicity and virulence can be used synonymously because they both refer to an organism's ability to cause disease.
Answer the following statement true (T) or false (F)
What unique structural adaptations are found in the mammalian brain that allowed mammals to become adept at higher mental activities?
A. A more direct connection to the spinal cord for faster conduction of neural impulses. B. An increased number of blood vessels that increases the vascularization of the brain. C. A higher degree of crevasses and folds in the neocortex that increases the surface area of the brain. D. An enlarged pons. E. A cranium that will protect the brain from damage.
Criteria for assigning pathogens to a biosafety level include all the following except
A) ability to culture the pathogen using standard laboratory media and equipment. B) availability of disease prevention and/or treatment. C) level of infectivity. D) extent of disease and mortality rates. E) mode of transmission.
True or False: Whereas prokaryotes contain 16S rRNA genes, eukaryotes instead contain 20S rRNA genes
a. TRUE b. FALSE