Searched it up on Google. It says Symbiosis
SELECTIVE BREEDING INVOLVES CHOOSING PARENTS WITH PATICULAR CHARACTERISTICS TO BREED TOGETHER AND PRODUCE OFFSPRING WITH MORE DESIRABLE CHARACTERS . ... CROSS BREEDING INVOLVES TWO DIFFERENT BREEDS FROM THE SAME SPECIES TO CREATE A NEW BREED
Uterine Lining. so Uterus. If it implanted in the Fallopian tubes 'it would result in a ectopic pregnancy which would result in miscarriage.
(a) very frequent use of something so that it stops being effective; an over-use.
