The Gila monster, a poisonous lizard, spends most of its life under rocks or burrowed in the ground. Which hypothesis most likely explains the Gila monster’s behavior?
a. The Gila monster has very few defenses and must hide from predators.
b. The Gila monster must hide underground or under rocks to ambush passing
prey.
c. The Gila monster feeds exclusively on small insects that live in the ground or
under rocks.
d. The Gila monster can only control its body temperature during hot desert days by
seeking cooler places.

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds