When a biological vector is used, which process must take place before recombinant dna can be placed in the host cells?

cloning

electrophoresis

genetic engineering

gene isolation

3. draw a topographic map that displays the following features: (4 points each) a. the contour interval is 20 meters. b. the point of lowest elevation is 960 meters. c. the point of highest elevation is 990meters. d. there is at least one sinkhole or depression, at any elevation. e. there is at least one steep slope and one gentle slope.