Contractile rings are made of cytoskeletal elements reorganized from the ______.
A. cell cortex
B. microfilaments
C. motor proteins
D. cleavage furrow
E. cell plate
Answer: A
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The arabinose operon (ara) provides a particularly interesting example of _____ in that when arabinose is present in the environment, the operon is transcribed
A) positive control B) negative control C) push forward control D) reverse transcription E) positive translation
True or False: In at least one group of bony fish (Osteichthyes) a structure known as a swim bladder was modified to become a primitive lung
A. true B. false
A microbiologist inoculates Staphylococcus aureus into a culture medium. Following incubation, both Staphylococcus aureus and Staphylococcus epidermidis are determined to be growing in this culture. What is the most likely explanation?
A. The culture was contaminated. B. The culture medium was differential. C. The incubation temperature was incorrect. D. The microbiologist used too much inoculum. E. The culture medium was selective.
IgD, IgM, IgG, IgA, and IgE are types of white blood cells
Indicate whether the statement is true or false