What term refers to the resting cell capable of developing into a new organism without fusion with another cell?

The correct term for a resting cell that has the ability to develop into a new organism without the fusion with another cell is spores. Spores are specialized cells that can remain dormant for extended periods and then germinate under suitable conditions, leading to the formation of a new organism. This process is common in various groups of organisms, such as fungi, plants, and some bacteria, allowing them to survive unfavorable environmental conditions.

Budding refers to a form of asexual reproduction where a new organism develops from a small outgrowth or bud on the parent organism; this does not involve a dormant cell. Binary fission, typically seen in bacteria, is a method of reproduction where a single organism splits into two identical daughter cells, which also does not involve resting cells. Implantation relates to the process by which a fertilized egg adheres to the wall of the uterus in mammals, which involves cell fusion and is not associated with the development of new organisms from dormant cells. Thus, spores are distinct in their capability of developing into new life forms independently.