Metaphase 1 Homologous pairs move together along the metaphase plate: the paired homologous chromosomes align along an equatorial plane that bisects the spindle.
This is what created the stark contrast bisecting the jungle of islands that Wallace first sketched out in 1859, and that still fascinates biogeographers today.
It was quite open to the heath on each side, and bisected that vast dark surface like the parting-line on a head of black hair, diminishing and bending away on the furthest horizon.
State highway 30 bisected the dam along a causeway, splitting the lake between the two rivers with a small bridge to allow water to flow between the two sections of the reservoir.