Question

Describe a situation where hybrid reproduction would cause two species to fuse into one.

Short answer

When the fitness level of hybrid offspring is equivalent to or greater than that of their parents, hybrid reproduction will result in the merging of two species into one.

Step-by-step solution

Hybrid reproduction :

Crossbreeding or hybrid reproduction is described as the crossbreeding of two individuals of distinct types, breeds, or populations. Both parents' qualities can be seen in the hybrid offspring.

:  Explanation : 

Hybrids are creatures that have been created by combining the features of two separate species or breeds. Hybrid speciation is a mechanism of speciation in which a new species is formed through the process of hybridization. After hybridization, children may have a better, lower, or equal degree of fitness as their parents.

Both the hybrid species and their descendants would breed indefinitely if their fitness levels were equal to or higher than their parents'. It would result in the merger of two species into one, as it would eventually bring all of the individuals under one species' cover.