Which of the following phyla is characterized by
radially symmetrical members?
a. Arthropoda
b. Cnidaria
c. Platyhelminthes
d. Chordata
e. Annelida
Answer: b
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The ATP made during fermentation is generated by _____
A) the electron transport chain B) substrate-level phosphorylation C) chemiosmosis D) oxidative phosphorylation E) aerobic respiration
External cues such as increasing day length or warming after a cold snap stimulate gibberellin synthesis, which results
in bolting in plants such as cabbages.
a. True b. False
A hospital uses a new cleaner to disinfect surfaces. Within a few years, many patients are developing infections from a bacterium that is resistant to the disinfectant. How does this happen?
What will be an ideal response?
A researcher inserted DNA fragments from an organism into expression vector plasmids and introduced the modified plasmids into bacterial cells. Which of the following methods would be an effective means of identifying which clones contain a specific gene of interest?
A. Sequence the DNA of the plasmids from each isolate. B. Prepare and analyze restriction fragments of the plasmids. C. Isolate clones that still have the vector's genetic marker. D. Use a DNA probe to detect colonies with the inserted DNA. E. Use reverse transcriptase to prepare cDNA copies.