Which of the following techniques is designed for separating and analyzing proteins according to their size?
A) Agarose gel electrophoresis
B) Affinity chromatography
C) Polyacrylamide gel electrophoresis
D) Microarray analysis
E) Sanger sequencing
C
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A paleontologist is studying a group of fossils from its first appearance in the fossil record to its extinction. She determines that the group descends from a single common ancestor and gave rise to no new species
Its appearance is distinct from any other group of fossils. Based on this information, she decides that it is a new species. In coming to this decision, which species concept or concepts is she using? Select all correct choices A. biological species concept B. morphospecies concept C. evolutionary species concept D. ecological species concept E. none of these
Explain what happens at the molecular level when a salt such as NaCl dissolves in water
What will be an ideal response?
What body feature is most responsible for freeing vertebrates from dependence on watery habitats?
a. lungs b. paired appendages c. shelled, amniote eggs d. a four-chambered heart e. fur
The oceanic province is that part of the ocean that overlies the continental shelf. Indicate whether the statement is true or false