The slow-growing organism Trichophyton rubrum produces a flat or heaped-up colony, generally white to reddish with a cottony or velvety surface. The cherry-red color is best observed on the reverse side of the colony. This organism is capable of infecting which of the following?
a. Hair and nails
b. Skin and nails
c. Hair and skin
d. Hair, skin, and nails
D
T. rubrum is a slow-growing organism that infects hair, skin, and nails. T. rubrum produces a flat or heaped-up colony, generally white to reddish with a cottony or velvety surface. The characte-ristic cherry-red color is best observed on the reverse side of the colony; however, this color is produced only after 3 to 4 weeks of incubation.
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a. revert to performing the duties of younger bees b. live longer c. begin laying eggs d. produce more octopamine e. develop impaired memories
Sperm production in humans start
a. before birth. b. shortly after birth. c. at puberty. d. during a man’s early twenties. e. in late teenage-hood.
The theory of evolution is the single most unifying concept of biology today
Indicate whether the statement is true or false
The term used to describe a harmless organism resembling a harmful one is:
a. warning coloration b. Batesian mimicry c. cryptic coloration d. Mullerian mimicry d. aposematic coloration