Which is the type of smoke that comes from the burning end of a cigar, pipe or cigarette ?
a. second hand smoke
b. sidestream smoke
c. mainstream smoke
d. passive smoke

The best time to go swimming is: a. directly after eating b. when you are feeling rested and energetic c. when you are feeling tired and sluggish d. a half hour after eating

Ana is a hospital researcher. she wants to preserve organs for further study in a chemical that is called formalin. prior topreserving the organs, ana wants to familiarize herself with the hazards of using formalin. ana should consult formalin'sa. materials safety data sheet.b. date of expiration.c. date of manufacture,d. additional laboratory uses,

Which of the following organs aids in swimming for fish? a. fins c. gills b. lungs d. scales