Which of the following statements concerning an F factor is FALSE?
a. It is found in recipient cells, not donor cells.
b. It is a DNA sequence.
c. It is found in F+ cells.
d. The F stands for fertility.
e. It is involved with forming sex pili.
A
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Which nutritional classification would you predict to fit most of the well-known members of the human microbiome?
A. Chemolithohetertrophs B. Chemoorganoheterotrophs C. Photolithoautotrophs D. Chemolithoautotrophs
Over time, cancerous cells typically lose the cell adhesion molecules embedded in their plasma
membrane. Loss of these molecules is best associated with which of the following traits of cancer cells?
a. increased rate of cell division b. production of new proteins c. angiogenesis d. migration to new locations in the body e. loss of chromosomes
Whales are believed to be products of divergent evolution sharing a common terrestrial ancestor with the modern hippopotamus. One piece of evidence that supports this theory that they were previously terrestrial is the presence of small bones in the tale of the whale believed to be leftovers from a time when whales had hips and lower limbs. What would we call these hips?
a. whale girdles b. homologous structure c. vestigial structures d. archetype features
Which fungicide will account for 15 percent of ozone thinning in future years unless its production is stopped?
a. amphotericin B b. nystatin c. methyl bromide d. dicarboximide e. ethylmercury bromide