when is timing critical?
for gravity Warm air moving into cold air earth's orbit when sperm and egg fuse flow of electrons earth's rotation Earth revolving around the sun movement of tectonic plates
A B C D E F G H
Fertilization As far as fertilization, timing is critical.
timing is critical when a sperm and an egg fuse
when is timing critical? (A) for gravity (B) Warm air moving into cold air (C) earth's orbit (D) when sperm and egg fuse (E) flow of electrons (F) earth's rotation (G) Earth revolving around the sun (H) movement of tectonic plates