Select all that apply smaller groupings within a species are called varieties/ races / breeds/ mongrels

The correct answers would be varieties, races, and breeds.

In binomial nomenclature, variety refers to the taxonomic rank present below the species and subspecies. It is mainly used in the nomenclature of plants.

In a taxonomic hierarchy, race refers to the informal rank below subspecies. The race includes a genetically distinct group of organisms within the same species.

Breeds refer to the different varieties of same species. These organisms similar to appearance, behavior, and other characteristics. It is mainly used for domesticated animals. For example, Rottweiler and German Shepherd are two different breeds of dog.

they fuse to form they have half as many chromosomes as a somatic cell of the same individual. b