Carlsbad caverns is unusual because the cave was originally carved from
a. iron oxide mixing with calcium carbonate
b. sulfuric acid rising from lower formations
c. acidic rainwater infiltrating through limestone
d. repeated rising and lowering of the water table

children tend to take more after their grandparents more than their parents. it’s the dna you received that was passed down to you somewhere in your family. maybe one of your grandparents had/has straight hair and you might have gotten it from them.

lizards have adapted to life in the desert. some desert lizards have toes with spiny scales to them run across the sand without sinking. some use the sand to hide from predators, or to search for small animals that they prey upon.