20 !
which of the structures in the cross sections above produce haploid sex cells?

a. a and c
b. a and d
c. b and c
d. b and d

Which action best increases one’s stamina a) exercising when you feel like it b) saving so much that one like sleep c) refusing to exercise to save the energy needed to work d)exercising on a regular basis

Which type of nerve creates a 'mental map" of the relative positioning of the body at any given point in time?

Which of these is likely to be the best source of valid health information?