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Jordan Arviv

on 13 October 2013

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Transcript of Introduction

05.03: Origin and Evolution of Life
Virtual Tour

Stop #1: Biological Evolution
Mammals started appearing on Earth about 200 million years ago.Mammals evolved in the Triassic period, dinosaurs and mammals apreared around the same time.

Stop #2 End of Dinosaurs, The beginning of Mammals
During the Triassic period, there was not much mammals on the planet yet, While the Dinosaurs were very big, most of the mammals were very small. Only when the Dinosaurs fell did the mammals began to grow.

Stop #3: Phylogeny
Phylogenics is the study of evolutionary biology. All organisms began with the first bacteria 3.4 billion years ago. Slowly bacteria evolved into the organisms we know today. Evolution comes from genetic mutations that are developed through the generations when organism copulate. Genetic mutations allows the organism to develop different traits and adapt to the environment. This leads to the branching seen in this pictures.
Stop #4: Physical Characteristics
A mammal is a warm-blooded vertebrate animal that has a skin that is more or less covered with hair, gives birth to a young one and has females who secrete milk for the nourishment of the young.
Step #5: Classifying Mammals
All mammals are animals, but not all animals are mammals. There are multiple kinds of animals. There are the birds that able to lay eggs and fly because they are covered in feathers. There are the reptiles that are cold-blooded with scaly skin. And then there are other types of animals that are different from mammals.
Welcome to the Fossil Tour. My name is Jordan and today I will take you along on an informative journey of the origins of the everyday mammal. We will find out where they came from and how they relate back to other organisms from the past. Also we will be finding out how mammals became what they are today.
Step #6 Related Organisms
Some organism that relate back to modern organism mammal-like beasts as Thrinaxodon and Cynognathus. By the time they went extinct in the mid-Jurassic period, some therapsids had evolved various proto-mammalian traits (fur, cold noses, warm-blooded metabolisms, and possibly live birthing) that were further elaborated upon by their descendants, the mammals that we know today.
Stop #7 Past and Present
These are some comparisons between the mammals of the past and present. Agriotherium and the Modern Bear Aepycamelus and the Modern Giraffe Basilosaurus and the Humpback Whale Strauss
Stop #8: Where Could They Be Found
Mammals can live pretty much anywhere. There are mammals like you and I living in houses, tents, apartments, etc. There are also mammals like whales living in the oceans. For the ones that like it colder like Polar bears, there's plenty of room in the Arctic. And for mammals who like things on the warm side, we've got deserts and jungles!
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