@Lecture02_9

@Lecture02_9 - 1 1 Fall 2009 GEL 107 Lecture 02...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 1 1 Fall 2009, GEL 107: Lecture 02 PALEOBIOLOGY 2 Fossil Record 3 How many species live today? How many species existed in the past, and how many of them are known? How do we collect/analyze fossils? Why is the fossil record useful despite its incompleteness? When did humans recognize fossils for what they are? 4 Answer: We do not know for sure. 5 6 Tropical rain forest 7 8 Answer: We do not know for sure. BUT, we have estimates. 9 Vertebrates Insects Reptiles Birds Mammals Amphibians ca. 5,000 ca. 10,000 ca. 8,000 ca. 5,000 Plants ca. 300,000 ca. 800,000 Fish at least. 50,000 In total 1.4 – 1.6 million Many others Number of Described Species 2 10 Estimated Number of All Species ca. 5 million (2-8 million) Some say 30 million 11 12 Based on an estimate of 14 million species 13 How many species live today? How many species existed in the past, and how many of them are known? How do we collect/analyze fossils?...
View Full Document

{[ snackBarMessage ]}

Page1 / 9

@Lecture02_9 - 1 1 Fall 2009 GEL 107 Lecture 02...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online