Hello can some one please tell me where ocean is please

Coquina, a type of limestone, forms from shell fragments that settle on the ocean floor. what type of rock is coquina?

Select the word from the list that best fits the definition a system made of 25 satellites

When the cell concentrates potassium within, against the natural tendency of matter, it is performing a.passive diffusion b.facilitated diffusion c.active transport d.pinocytosis