what requires penetration?
gravity weathering gastropod shells the skin an object death Veins and arteries. fertilization
A B C D E F G H
Penetration is when the sperm and egg meet and the sperm makes it way into the egg cytoplasm.
fertilization requires penetration
what requires penetration? (A) gravity (B) weathering (C) gastropod shells (D) the skin (E) an object (F) death (G) Veins and arteries. (H) fertilization