Explain how and why natural selection has allowed species such as sharks and alligators to remain genetically stable for thousands of years.

Directions: read the descriptions of the four islands presented in the lesson. 1. list two new traits that each new species of rat might demonstrate as it adapts to the conditions on each island. 2. introduce one of the four new rat species to another island and describe one challenge it would encounter and one success as it adapts to its new environment.

The function of the excretory system is to control homeostasis and

Which if the following best describes why invertebrates isn’t considered a scientifically valid word when classifying animals