During the cell cycle, specifically g1 interphase, a cell must reach a sufficient size and produce enough atp in order to

Double the amount of DNA and keep normal function at the same time

Explanation:

Interphase is a phase of the cell cycle, the main goal of the cell in this phase is to growth in order to give space to double the amount of DNA. The first and most significant growth happens during a phase known as G1, during it the centromere and the other components are made while performing normal function, therefore their normal production of ATP must continue.

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the reason the two sea urchins don't compete with each other for food, resources, etc. is because the urchins have adapted to the environment but they have also adapted to each other. this is most likely because the genes of the sea urchins.

i believe you meant to say air rather than hair so the answer is below ")

the dead sea, the lowest place on earth at 430 metres (1,410 ft) below sea level, has a correspondingly high typical atmospheric pressure of 1065 hpa.