What caused the barks to turn dark? A. industrial revolution smoke from factories

B. industrial water from that time

Metamorphic rocks are formed when sedimentary or igneous rocks are subjected to heat or pressure and recrystallize without melting. which of the following rocks results from the metamorphism of limestone? a. granite b. slate c. sandstone d. marble

Organisms within a population must compete for resources to survive

Witch type of microscope is used to view very small cell components like proteins and dna?