Which of the following characteristics is not found in cruising fishes such as tuna? They are capable of short periods of high-speed swimming. They swim constantly in search of prey. They tend to have lunate tails. They rely on a swim bladder for neutral buoyancy. Their muscle tissues are mostly red.

tissue

explanation:

it is actually formed by geoup of cells which is tissue

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