When marine animals die, their shells decay into limestone. When the limestone is exposed, is released. This is a process known as .

What protects the lining of the stomach from acidic gastric juices?

Competition occurs between species when

Indicate the coat color and the proportion of offspring with that color for each of the following crosses of rabbits. assume all are homozygous. chinchilla x chinchilla 1/2 agouti, 1/2 chinchilla 3/4 agouti, 1/4 chinchilla all chinchilla