Complex chemical processes such as photosynthesis occur in a controlled series of steps with the help of A. enzymes
B. nucleic acids
C. phospholipids
D. fatty acids

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

How can a geological time scale best be reconstructed? a) comparing vestigial structures in living species b) comparing homologous structures in living species c) examining homologous structures in fossil remains d) examining the written records of scientists from past cultures

Which process of living things produces water that enters the water cycle