Why can gel electrophoresis separate dna fragments?
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a. dna fragments are positively charged.
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b. dna fragments are negatively charged.
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c. dna fragments are magnetic.
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d. dna fragments are all the same size.

The earth consists of a variety of different organisms. despite their diversity, however, some similarities on the structural and metabolic levels may be seen. these similarities can be attributed to a. similarities among organisms in their proteins and nucleic acids. b. the ability of organisms to readily adapt to sudden environmental changes. c. similarities in organisms' habitats and niches. d. the ability of all organisms to interbreed and produce new species.

Which of the following is a way that minerals are used? a. industry construction technology d. all of the above

Identify any four organelles that should be present in the eukaryotic organism and describe the function of each organelle