There are more hydrogen atoms in living organisms than any other atom, but oxygen is more abundant in terms of mass.
why is this statement true?
a. hydrogen is a gas, but oxygen is a solid.
b. hydrogen atoms have a lower mass than oxygen atoms.
c. hydrogen is mostly in liquid form and oxygen is in solid form.
d. hydrogen is present as single atoms and oxygen is bonded in compounds.

Which best describes the digestive system of arthropods? a incomplete, two openings b complete, one opening c two-way, one opening d one-way, two openings

Acar company is testing seatbelts using crash test dummies. the company finds that when cars come to a sudden stop, the crash test dummies' bodies continue to move forward. the seat belt keeps the crash test dummies from hitting the back of the seat in front of them. why do the crash test dummies' bodies continue to move forward even though the car stopped? a. the friction opposing their bodies' movement keeps them in motion. b. the inertia of their bodies keeps them in motion. c. the forward acceleration of the car keeps them in motion. d. the gravity pulling on the car keeps them in motion.

Nerve cells are specialized to respond to stimulitrue or false?