If a man's vas deferens is surgically cut and tied off how will it affect him?

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.

What maintain homeostasis when a persons internal body temperature is 97.5°f

What advantages does a pedigree have over a written passage?