Theoretically, living organisms are capable of producing populations of infinite size. however, this never occurs because population sizes are limited by

Biotic and Abiotic factors

Explanation:

Biotic factors such as predators can limit the population size.

Abiotic factors such as drought,torrential rainfalls,climate change,dessication etc.

lizards have adapted to life in the desert. some desert lizards have toes with spiny scales to them run across the sand without sinking. some use the sand to hide from predators, or to search for small animals that they prey upon.