Complex sentence: A study carried out in 2009 injected scorpions with the venom of various "Echis" species, and found a high correlation between the proportion of arthropods that the snakes consumed in their natural habitat, and the toxicity of their venom to scorpions.
Split into simpler sentences: A study carried out in 2009 injected scorpions with the venom of various "Echis" species. The researchers found that there was a high correlation between the proportion of arthropods that the snakes naturally consumed, and the toxicity of their venom to scorpions.