Echinoderms do not:a
develop as deuterostomes.
b. fall within the group Bilateria.
c. show evidence of segmentation.
d. fall on the eumetazoan branch of animals.
e. fall within the group Deuterostomia.
C
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In the experiment performed by Lederberg and Tatum bacteria of different genotypes had to be mixed together to obtain genetic transfer
However, Davis performed the experiment in a slightly different manner by separating cells with a filter incapable of allowing bacteria to pass. What possibility did the experiment by Davis exclude that could have occurred by the protocol used by Lederberg and Tatum? A. transformation B. conjugation C. generalized transduction D. specialized transduction
A molecule or anything else that transports new genes into a cell is called a
a. vector. b. plasmid. c. restriction enzyme. d. bacterium.
Recombinant DNA technology
a. uses bacteria to make copies of the desired product. b. splices DNAs together. c. is possible only between closely related species. d. uses bacteria to make copies of the desired product and splices DNAs together. e. uses bacteria to make copies of the desired product and splices DNAs together, but is possible only between closely related species.
If a ray-finned fish is to both hover (remain stationary) in the water column and ventilate its gills effectively, then what other structure besides its swim bladder will it use?
A) its pectoral fins B) its lateral line system C) its caudal (tail) fin D) its opercula