Which characteristics do all bony and jawless fish have in common? Check all that apply. [] backbone

[] swim bladder

[] scales

[] gills

[] bony skeleton

THIS IS NOT A MULTIPLE CHOICE! YOU MUST SELECT ALL THE CORRECT ANSWERS.

Which class of molecules contains the amino group, nh2 (a) sugars (b) water (c) proteins (d) hydrocarbons

Which technically is nasa developing that will astronauts reach mars

The oxidizing agent our bodies use to obtain energy from food is oxygen (from the air). if you breathe 15 times a minute (at rest), taking in and exhaling 0.5 l of air with each breath, what volume of air do you breathe each day? air is 21% oxygen by volume. what volume of oxygen do you breathe each day?