Define the two classes of natural resources

Non-renewable resources are those who cannot be easily replaced once they are destroyed and renewable sources can be replaced

name and explain one of the event that occurs during meiosis that increases the variation in offspring even more than simple reproduction?

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.