The expected outcome of an oxidase test performed to identify Neisseria menigitidis is
A. a color change of a colony from tan to black when oxidase reagent is added.
B. the amplification of the oxi gene as detected on an agarose gel.
C. cells colored black when stained and viewed under the microscope.
D. a zone of clearing surrounding colonies on chocolate agar.
E. the appearance of bubbles when cells are mixed with hydrogen peroxide.
Answer: A
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What is the correct order of general transcription factor assembly at an RNA polymerase II promoter?
A. TFIIB, TFIID, TFIIF, TFIIH B. TFIIB, TFIIH, TFIID, TFIIF C. TFIID, TFIIB, TFIIF, TFIIH D. TFIID, TFIIF, TFIIH, TFIIB E. TFIIF, TFIIB, TFIID, TFIIH
Four of the following were innovations that led to new adaptive zones. Select the exception
a. flight-capable wings in birds b. amniotic eggs in early reptiles c. Galápagos finches evolved to eat differently sized seeds d. sperm cells carried in pollen grains in seed plants e. silk glands in spiders
In frogs, the gray crescent appears
a. after the egg matures. b. after fertilization. c. during blastula formation. d. following gastrulation. e. as a result of tissue specialization.
Protothecosis is an infection of humans or animals that is caused by a chlorophyte (green algae).
Answer the following statement true (T) or false (F)