What makes a substance a base

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

Yeast cells reproduce quickly by budding. this is a form of reproduction so all the yeast cells a) sexual; vary b) asexual; vary c) asexual; are identical d) sexual; differ from the parents submit hint structures and functions of cells cellular reproduction

What is the most important inorganic material for livings things? ! due tomorrow!