Lecture 7 posted - BIO 311D LECTURE 7 LECTURE Beginnings of...

Info iconThis preview shows pages 1–22. Sign up to view the full content.

View Full Document Right Arrow Icon
BIO 311D BIO 311D LECTURE 7 LECTURE 7 Beginnings of life, Beginnings of life, extinctions extinctions Earth 3.5 billion years ago Earth 3.5 billion years ago
Background image of page 1

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

View Full DocumentRight Arrow Icon
Deep time… How can one really appreciate how old the earth is?
Background image of page 2
Background image of page 3

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

View Full DocumentRight Arrow Icon
Background image of page 4
Background image of page 5

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

View Full DocumentRight Arrow Icon
website
Background image of page 6
What is the origin of life? What is the origin of life?
Background image of page 7

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

View Full DocumentRight Arrow Icon
Panspermia
Background image of page 8
Chemical origin of life
Background image of page 9

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

View Full DocumentRight Arrow Icon
Earth’s early atmosphere
Background image of page 10
Organic compounds from space?
Background image of page 11

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

View Full DocumentRight Arrow Icon
Evolution in the deep ocean?
Background image of page 12
Plate tectonics
Background image of page 13

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

View Full DocumentRight Arrow Icon
Background image of page 14
Life is a continuum Chemical and physical processes on early Earth produced very simple cells through a sequence of stages.
Background image of page 15

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

View Full DocumentRight Arrow Icon
First genetic material: RNA Ribozymes Ribozyme (RNA molecule) Template Nucleotides Complementary RNA copy 3 5 5
Background image of page 16
Protobionts 20 μ m Glucose-phosphate Glucose-phosphate Phosphorylase Starch Amylase Maltose Maltose Phosphate
Background image of page 17

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

View Full DocumentRight Arrow Icon
First cells - prokaryotes
Background image of page 18
Eukaryotic cells
Background image of page 19

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

View Full DocumentRight Arrow Icon
The evolution of multicellular organisms
Background image of page 20
Geologic time Time periods are based primarily on fossils. Know these in order. Precambrian: 3.5bya - 550mya
Background image of page 21

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

View Full DocumentRight Arrow Icon
Image of page 22
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 37

Lecture 7 posted - BIO 311D LECTURE 7 LECTURE Beginnings of...

This preview shows document pages 1 - 22. Sign up to view the full document.

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