GMAT – Section 1: Test 2

Two of the features observed among some species of a newly classified family of water-dwelling reptiles, the MarBog lizards, are suction cups on the underside of their hands and feet as well as patagia, or bat-like “wings” that extend from their wrists to their lower torso. All the species ever determined to have dwelled in the Hnogo River have had the suction cups but have lacked the patagia. The patagia makes it impossible for MarBog lizards to swim in fast flowing water such as that found in the Hnogo River. Evidence of habitation by Marbog lizards has been identified at the mouth of the Hnogo River, where it empties into the Dugu Bay. Although none of the Marbog lizards are able to survive in a saltwater environment, the mouth of the Hnogo River has been salty throughout recent times.