Insects use _____ as a respiratory system
a. integument exchange
b. lungs
c. tracheal exchange
d. gills
e. capillary tubes
ANSWER: c
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The major virulence factor of Corynebacterium diphtheriae that causes serious systemic effects is its ________.
A. endospores B. capsule C. exotoxin D. metachromatic granules E. endotoxin
The space between the branched nerve endings and the muscle cell membrane is called a
a. myelin sheath. b. synapse. c. dendrite. d. gap junction. e. tight junction.
If an AABB strain is mated with an aabb strain, an AB gamete produced by the resulting F1 is
A) impossible. B) parental. C) recombinant. D) the most common. E) None of these
Septicaemia refers to spread of bacterial toxins in blood while toxaemia refers to clinical blood infection by large and multiplying pathogenic microbes
a. true b. false