Question

a species of flamingo has adapted to the unusual lake conditions, too. these smaller flamingos have thick skin on their legs that does not get burned in the waters of lake natron. the flamingos get their pink coloration from eating lots of the red algae. about 2 million flamingos live around the lake when water levels are high and therefore less salty, but the appalling water does not attract predators that would normally hunt them. the birds nest around the lake in relative safety and then migrate to fresher areas as soon as water levels drop and their chicks can travel. amazingly, one type of fish has also adapted to life in lake natron. the fish are so specialized that they are called “alkaline tilapia.” the fish eat mainly algae and feed early in the day when the water is cool. during the afternoon, they move to the bottom of the lake, where they dig nests. this species of tilapia has a higher internal ph than most fish, and they produce an enzyme that enables them to convert the alkaline water into waste. if other species of fish were introduced to the conditions in lake natron, they would likely not survive longer than an hour. technically, the alkaline tilapia is an endangered species because their overall numbers are low, but their low numbers are because they can only most species of fish cannot live in lake natron because they cannot eat algae do not make an enzyme are eaten by animals that visit the lake have been outcompeted by the fish that live there

Explanation:

The text mentions that the Alkaline Tilapia in Lake Natron has a higher internal pH and produces an enzyme to convert alkaline water into waste, which most other fish cannot do. So most species of fish cannot live in Lake Natron because they do not make such an enzyme.

Answer:

do not make an enzyme