This kettle lake formed 14,000 years ago when a glacier that covered the surrounding area melted. Initially devoid of animal life, overtime the lake was colonized by invertebrates and other animals. If you are a researcher, based on the background information, hypothesize how mutation, natural selection, genetic drift, and gene flow may have affected populations that colonized the lake.

Been sitting here trying to take this test and don't know this answer! place the events of a feedback mechanism associated with body temperature in the correct order. ·nerve cells send message from skin to the brain ·body returned to normal temperature around 98.6 degrees f ·temperatures regulation center in the brain sends out signals ·body temperature exceeds 98.6 degrees f ·sweat glands throughout the body activate to cool off skin surface it is a 1 through 5 question in biology!