Scientists have changed the DNA of a type of cabbage so that it contains a tiny amount of poison from a scorpion’s tail. The poison in the cabbage kills caterpillars that try to eat it. This is an example of ____.
A. gene therapy
B. selective breeding
C. genetic engineering
D. artificial selection
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Look at the image. Describe the DNA fragments towards the bottom of the gel electrophoresis.
A. larger and they move faster
B. smaller and they move faster
C. larger and they move slower
D. smaller and they move slower
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