Streptoymces erythraeus is the bacterial source of which antibiotic?
A) Penicillin
B) Streptomycin
C) Erythromycin
D) Bacitracin
E) Ampicillin
C
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Chlamydiae are MOST commonly transmitted throughout environments by insects
Indicate whether the statement is true or false.
The determination of carbohydrate utilization patterns for the differentiation of Neisseria spp. and M. catarrhalis is best performed by:
a. incubation of inoculated cysteine trypti-case soy agar (CTA) with 1% dextrose, maltose, lactose, and sucrose for 48 to 72 hours. b. oxidative-fermentative (OF) medium with dextrose, maltose, lactose, and sucrose. c. heavy inoculation of buffered, low-peptone substrate with dextrose, maltose, lactose, and sucrose. d. carbohydrate testing strips.
As a plant embryo grows, different body regions develop shapes and structures that correlate with their function. This process is called
1.dedifferentiation 2.homeosis 3.morphogenesis 4.positional development
Which of the following statements is false?
a. Neurons in the brain can interpret incoming action potentials only in certain ways. b. Optic nerve impulses can only be interpreted as light. c. Some sensory receptors do not convert a stimulus to nerve impulses. d. The stronger the stimulus, the more action potentials are generated. e. A strong stimulus activates many adjacent receptors, thereby increasing the number of action potentials and the level of awareness for the stimulus.