In my mammalogy lecture last week, we learned about zoogeography and its effect on early and present day marsupials. First off, zoogeography is a method to describe the local and global distribution of species based on the environment. There are seven zoogeographical regions around the world. They are: Nearctic (modern day North America), Neotropical (South America), Ethiopian (Africa), Oriental (Southern Asia), Australian (Australia), and Palearctic (Eurasia). With the topic of marsupials, we discussed evolution and their historical regions. Most marsupials today are only found in Australia, with the exeption of the opossum and the colocolo, but millions of years ago they were in modern day Antartica and all over north and South America back when the continents were connected. When the continents split, the isolation and change in climates led to extinction of early marsupials in Antartica and most of North and South America.
Comments
Suggestion
Nice flow in your paragraph, however you could elaborate what 'marsupials' are in specific, as the reader may not know what that term means.
Second Sentence
You could remove the "First off" at the start of the second sentence, I don't think it's necessary.