Toxic substances secreted by bacterial cells during their growth are called _______________

Body regions with muscles used for fine, precise movements have:

a. Large representations on primary motor cortex b. Small representations on primary motor cortex

Assuming a constant flow, what will happen to a fluid if the cross-sectional area of the tube in which its flows decrease?

a. Its velocity will increase. b. Its velocity will decrease. c. Its density will decrease. d. Its viscosity will decrease.