In this investigation, E. coli cells are exposed to plasmids containing a gene for resistance to ampicillin. If the susceptible E. coli bacteria incorporate the foreign DNA, they will become ampicillin resistant. Which of the following statements are true?

Select all that apply.
A. Transformation follows the uptake of foreign proteins into a cell.
B. Plasmid DNA containsgenes essential for normal function.
C. Transformation occurs when foreign genes are introdicued into a host cell.
D. Bacterial cells have several linear chromosomes.
E. Plasmids can be engineered to carry foreign DNA.

Select the correct answer from each drop-down menu proteins are

Two students are working together on an experiment that measures the effect of different liquid fertilizers on the thickness of plants’ stems. which is most likely to result in the greatest amount of error in their scientific experiment? a.one student measures the plant stem widths by using calipers. the other student measures the widths of the same plant stems again by using a different pair of calipers. b.one student measures the plant stem widths by using calipers. the other student types the measurements as they are taken into a computer spreadsheet. c.one student weighs liquids for the experiment by using a calibrated scale. the other student weighs liquids for the experiment by using a different calibrated scale.

What substance is the most acidic. lemon juice. tomato juice. sodium hydroxide. water