You're probably thinking of a Mizpah.
From Wikipedia:
Mizpah is an emotional bond between people who are separated (either physically or by death). Mizpah jewelry is worn to signify this bond, and the word "mizpah" can often be found on headstones in cemeteries and on other memorials. From Genesis 31:49 of The Bible
"And Mizpah; for he said, The Lord watch between me and thee, when we are absent one from another."
A line of Symmetry.
Bilateral symmetry divides an organism into left and right halves.
If the two halves are identical then the line is a line of symmetry and is also a bisector.
The Equator is the primary one, but any line of longitude will split the Earth into two equal halves.
No it doesn't. It splits it into two equal halves, so say you have two lines at 600, then the angle bisector would be 300
Identical twins (monozygotic) occur when a single egg, fertilized by a single sperm, splits into two identical halves. Two separate babies with identical DNA are formed. Identical twins are always the same sex and blood type. http://www.twin-pregnancy-and-beyond.com/identical-twins-or-fraternal-twins.html
Each cell splits into two halves. Therefore, each cell division increases by two - or is said to double each time.
a bacterium splits into two equal halves with identical genetic information or cell divides into two cells with identical genetic information
one
Two halves make a whole. Or You have two halves!?
It's actually spelled butt-CHEEK and it's a half of your butt. Your butt-crack splits the butt into halves , making the two butt cheeks.
Zero!