A donkey and a horse are considered separate species. They can mate, making a animal called a mule, but mules are sterile and cannot mate.
Because their offspring can't make donkeys and horses are separated by
O gametic isolation.
O reduced hybrid viability.
O mechanical isolation.
O reduced hybrid fertility.

Based on the results of this study, what questions remain unanswered? how can these questions guide future research

{answer found. it's (3 ) }which statement describes the cell cycle? (1)the cell cycle is a process in which one cell divides into four genetically different cells. (2)the cell cycle is a process in which one cell divides into two genetically different cells. (3)the cell cycle is a process in which one cell divides into two genetically identical cells. (4)the cell cycle is a process in which one cell divides into four genetically identical cells.

Asegment of dna that codes for rna and a protein is a