You are a paleontologist studying how early land vertebrates evolved to live in different habitats. what do you study? mastering biology

Me with these questions if you’re it sure don’t answer

The function of the excretory system is to control homeostasis and

Which of the following is a reason why early living organisms on earth could not have survived on the surface? 1. the lack of an ozone layer 2. the lack of oxygen in the atmosphere 3. the fact that these organisms were single-celled