It took approximately years for oxygen to become a large component of earth's atmosphere

Why are fossils not found in igneous rocks? igneous rocks are made from cooling of lava or magma. igneous rocks are found too deep underground. igneous rocks are too dark in color to contain fossils. igneous rocks are too dense to contain fossils.

Explain the significance of the increased cell specialization of the volvocine line

Natural resources are any materials that humans obtain from the earth to meet our wants and needs.