The skin infection streptothrichosis is caused by members of the genus ________.
A. Streptomyces
B. Streptococcus
C. Dermatophilus
D. Propionibacterium
Answer: C
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If a set of genes is induced in the presence of the controlling substance, it is referred to as ________ control.
Fill in the blank(s) with the appropriate word(s).
Where in a growing plant would you expect to find the highest concentration of auxin?
A. in the leaf margins of mature leaves B. in axillary buds that are not growing C. in the apical meristem D. in the floral meristem
What are the nodes of Ranvier?
A. breaks in the myelination along an axon B. the population of voltage-gated sodium channels located at the axon hillock C. the point of communication between an axon terminal and a muscle cell D. branch points along an axon
In which phase of the cell cycle does eukaryotic DNA replication take place?
a. M phase b. G0 c. S phase d. R phase