During the winter you become sick with the flu. shortly after that, you become sick with strep throat. will the same type of b-cells that fought the pathogen that caused the flu fight the pathogen that causes strep throat?
a
yes. every b cell is capable of fighting every pathogen with which it comes in contact.
b
yes. b cells recognize similar antigens such as bacterial and viral pathogens.
c
no. b cells fight viruses while t cells fight bacteria.
d
no. each b cell is capable of recognizing one specific antigen.

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.