Which of the following could be considered a habitat island?
A. a person in line at the train station
B. a lake surrounded by trees
C. a patch of moss on a tree trunk
D. All of the answer options are correct.
E. None of the answer options is correct.
D
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The DNA molecule usually is made up of how many strands?
a. 1 b. 2 c. 3 d. 6 e. 12
The shape of a virus is determined by
its DNA. its RNA. its envelope. its host. its coat protein organization
In a cilium or flagellum, _______microtubules are arranged _______.
a. 13; in a circle b. 9 triplet; in a circle c. 9 doublet; in a circle around a central pair of microtubules d. 2 microtubules; perpendicular to each other e. 2 microtubules; parallel to each other
In which organism is a beta-barrel folding domain most likely to be found?
A. Homo sapiens B. Drosophila melanogaster C. Escherichia coli D. Caenorhabditis elegans E. Saccharomyces cerevisiae