At a Glance

Life on Earth Chapter 19 The History of Life on Earth
At a Glance

Origins: Prebiotic evolution was controlled by the early atmosphere and climate.

The First Life
Eukaryotes evolved membrane-enclosed organelles and a nucleus.

Multicellularity

Multicellular Life in the Sea
Multicellular plants evolved specialized structures that facilitated their invasion of diverse habitats.
Multicellular animals evolved specializations that allowed them to capture prey, feed, and escape more efficiently.

The Invasion of the Land
Some plants evolved specialized structures that adapted them to life on dry land.
Some animals evolved specialized structures that adapted them to life on dry land.

Human Evolution
Primate evolution has been linked to grasping hands, binocular vision, and a large Brain.
Hominids evolved from dryopithecine primates.
Australopithecines, the first true hominids, could stand and walk upright.
The evolution of human behavior is highly speculative.

Evolutionary Connections: Why Do Humans Walk Upright?
The First Life: Eukaryotes evolved membrane-enclosed organelles and a nucleus.

Multicellularity

Multicellular Life in the Sea
Multicellular plants evolved specialized structures that facilitated their invasion of diverse habitats.
Multicellular animals evolved specializations that allowed them to capture prey, feed, and escape more efficiently.

The Invasion of the Land
Some plants evolved specialized structures that adapted them to life on dry land.
Some animals evolved specialized structures that adapted them to life on dry land.

Human Evolution
Primate evolution has been linked to grasping hands, binocular vision, and a large Brain.
Hominids evolved from dryopithecine primates.
Australopithecines, the first true hominids, could stand and walk upright.
The evolution of human behavior is highly speculative.

Evolutionary Connections: Why Do Humans Walk Upright?
Multicellularity
Multicellular Life in the Sea: Multicellular plants evolved specialized structures that facilitated their invasion of diverse habitats.
Multicellular animals evolved specializations that allowed them to capture prey, feed, and escape more efficiently.

The Invasion of the Land
Some plants evolved specialized structures that adapted them to life on dry land.
Some animals evolved specialized structures that adapted them to life on dry land.

Human Evolution
Primate evolution has been linked to grasping hands, binocular vision, and a large Brain.
Hominids evolved from dryopithecine primates.
Australopithecines, the first true hominids, could stand and walk upright.
The evolution of human behavior is highly speculative.

Evolutionary Connections: Why Do Humans Walk Upright?; Multicellular animals evolved specializations that allowed them to capture prey, feed, and escape more efficiently.

The Invasion of the Land
Some plants evolved specialized structures that adapted them to life on dry land.
Some animals evolved specialized structures that adapted them to life on dry land.

Human Evolution
Primate evolution has been linked to grasping hands, binocular vision, and a large Brain.
Hominids evolved from dryopithecine primates.
Australopithecines, the first true hominids, could stand and walk upright.
The evolution of human behavior is highly speculative.

Evolutionary Connections: Why Do Humans Walk Upright?
The Invasion of the Land: Some plants evolved specialized structures that adapted them to life on dry land.
Some animals evolved specialized structures that adapted them to life on dry land.

Human Evolution
Primate evolution has been linked to grasping hands, binocular vision, and a large Brain.
Hominids evolved from dryopithecine primates.
Australopithecines, the first true hominids, could stand and walk upright.
The evolution of human behavior is highly speculative.

Evolutionary Connections: Why Do Humans Walk Upright?; Some animals evolved specialized structures that adapted them to life on dry land.

Human Evolution
Primate evolution has been linked to grasping hands, binocular vision, and a large Brain.
Hominids evolved from dryopithecine primates.
Australopithecines, the first true hominids, could stand and walk upright.
The evolution of human behavior is highly speculative.

Evolutionary Connections: Why Do Humans Walk Upright?
Human Evolution: Primate evolution has been linked to grasping hands, binocular vision, and a large Brain.
Hominids evolved from dryopithecine primates.
Australopithecines, the first true hominids, could stand and walk upright.
The evolution of human behavior is highly speculative.

Evolutionary Connections: Why Do Humans Walk Upright?; Hominids evolved from dryopithecine primates.
Australopithecines, the first true hominids, could stand and walk upright.
The evolution of human behavior is highly speculative.

Evolutionary Connections: Why Do Humans Walk Upright?; Australopithecines, the first true hominids, could stand and walk upright.
The evolution of human behavior is highly speculative.

Evolutionary Connections: Why Do Humans Walk Upright?; The evolution of human behavior is highly speculative.

Evolutionary Connections: Why Do Humans Walk Upright?
Evolutionary Connections: Why Do Humans Walk Upright?

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