A high tide will occur usually only once in a 24-hour period
only in bodies of water close to the moon
on both sides of the earth at the same time
when proximity to the sun makes the days longer

i believe it would be the lungs.

the element that provides strength to the exoskeletons of clams and oysters is phosphorus.

this is so because calcium carbonate is the main component in the shells. calcium carbonate is strengthened by phosphorus.

explanation:

the cell cycle is the final answer! : )