And once we were done with that charge, it still returned a decent 34 miles per gallon under gas propulsion or gas hybrid propulsion, really. Experimental studies suggest that hybridization offers a rapid route to speciation, a prediction confirmed by the fact that early generation hybrids and ancient hybrid species have matching genomes, meaning that once hybridization has occurred, the new hybrid genome can remain stable. So if you need some battery and you're coming into London or whatever city might have restrictions, you hold down the charge button and the gasoline motor actually charges the battery. Further information: Genetic mixing and Introgression. Luxury hybrids offer impressive fuel economy, of course, but healthy power from their electric motors can also make them quicker than their gas-powered counterparts. Other Words from hybrid hybrid adjective. Plant Physiology. Plant species that are genetically compatible may not hybridize in nature for various reasons, including geographical isolation, differences in flowering period, or differences in pollinators. A few animal species and many plant species, however, are the result of hybrid speciation , including important crop plants such as wheat , where the number of chromosomes has been doubled.