Gradualism suggests that change is gradual with the accumulation of unique morphological adaptation. Punctuated Equilibrium suggests that rapid change.

Slides:

Advertisements

Similar presentations

KEY CONCEPT Evolution occurs in patterns.

Advertisements

Evidence of Evolution FOR EVOLUTION.

Patterns in Evolution.

MACROEVOLUTION AND THE ORIGIN OF SPECIES

Chapter 17 The History of Life

Patterns of Evolution. Macroevolution/Microevolution allele gene  Both involve changes in allele frequencies in gene pools same basic  Both work through.

End Show Slide 1 of 25 Copyright Pearson Prentice Hall Biology.

19-2 Patterns and Processes of Evolution

Evidence for Evolution. Agree or Disagree? Evolution occurs in short periods of rapid change in species and is separated by periods of little or no change.

CHAPTER 14 The Origin of Species

Chapter 19.2 (Pgs ): Patterns and Processes of Evolution

Convergent, divergent, parallel and co-evolution.

Patterns in Evolution.

Chapter 24 Macroevolution and Speciation. Macroevolution Macroevolution refers to any evolutionary change at or above the species level. Speciation is.

Patterns of Evolution. Sequential Evolution Changes in the gene pool from one generation to the next. Populations evolve gradually as they become adapted.

Ch. 16: Evolution of Populations

11.6 Patterns in Evolution Evolution through natural selection is not random.

1. Compare and Contrast How is mass extinction different from background extinction 2. Relate Cause and Effect Why would evolution speed up when a small.

Patterns of Evolution Honors Biology- Mr. Wilmot.

Macroevolution. Gradualism & saltation Gradualism: large changes in phenotypic characters have evolved through many slightly different intermediate states.

Section 19-2: Patterns and Processes of Evolution.

Slide 1 of 25 Copyright Pearson Prentice Hall Biology.

Patterns of Evolution SC Standard B-5 Students will demonstrate an understanding of biological evolution & the diversity of life.

Slide 1 of 25 Copyright Pearson Prentice Hall 17-4 Patterns of Evolution.

End Show Slide 1 of 25 Copyright Pearson Prentice Hall 17-4 Patterns of Evolution Macroevolution refers to large-scale evolutionary patterns and processes.

OBJECTIVES: 1) EXPLAIN WHY DEFINING SPECIES IS DIFFICULT 2) IDENTIFY CAUSES OF SPECIATION 3) DESCRIBE MACROEVOLUTIONARY PROCESSES/PATTERNS SPECIATION &

TOPIC 7- EVIDENCE FOR THE THEORY OF EVOLUTION

Do Now: Compare the two graphs below.

Patterns in Evolution.

Theory explaining how species form

Patterns in Evolution.

History of Life on Earth

EQ: What patterns can be observed in evolution?

Patterns and Mechanisms of Evolution

Bellringer What is speciation?.

Punctuated equilibrium

The Fossil Record Fossils are preserved traces of and remains of ancient life. Fossils form in a variety of ways. Through fossils we are able show how.

Unit 1: Evolution Lesson 3: HOW Evolution (Macro-Evolution)

Let’s Review! Directional Selection

KEY CONCEPT Evolution occurs in patterns.

17-4 Patterns of Evolution

Patterns in Evolution.

Evidence for Evolution

Patterns in Evolution.

Speciation, Macroevolution, and Microevolution

KEY CONCEPT Evolution occurs in patterns.

Aim: What are the Patterns of Evolution?

Patterns of Evolution.

KEY CONCEPT Evolution occurs in patterns.

Patterns of Evolution *.

19.2 Patterns and Processes of Evolution

Hybrid Zones -What can happen when new or partially formed species come into contact.

17-4 Patterns of Evolution

Copyright Pearson Prentice Hall

Chapter 19-2 p “Patterns and Processes of Evolution”

The Pace of Evolution.

KEY CONCEPT Evolution occurs in patterns.

KEY CONCEPT Evolution occurs in patterns.

RATES OF EVOLUTION Gradualism and punctuated equilibrium are two ways in which the evolution of a species can occur. A species can evolve by only one of.

KEY CONCEPT Evolution occurs in patterns.

KEY CONCEPT Evolution occurs in patterns.

Unit 10: Speciation 10.5 Patterns of Evolution.

Adaptive Radiation Remember Darwin’s Finches?

The Dance of Evolution Evolution - the change in life over time; descent with modification theories…theories…theories… Lamarck - species evolve by keeping.

KEY CONCEPT Evolution occurs in patterns.

Chapter 17 The History of Life

KEY CONCEPTS Evolution occurs in patterns:

KEY CONCEPT Evolution occurs in patterns.

Evolution Part 2 Pathways of evolution.

Presentation transcript:

Gradualism suggests that change is gradual with the accumulation of unique morphological adaptation. Punctuated Equilibrium suggests that rapid change occurs, with a new species “erupting” from the ancestral lineage and then staying the same thereafter.

Gradualism TThe evolution of new species by gradual accumulation of small genetic changes over long periods of time SSlow and steady change in an organism OOver a short period of time it is hard to notice

Gradualism Current living zebras (top), extinct quaggas (bottom)

Gradualism

Gradualism

Punctuated Equilibrium SStable periods of no change (genetic equilibrium) interrupted by rapid changes involving many different lines of descent RRare, rapid events of branching speciation

 Horseshoe crabs have changed little since their first appearance in the fossil record.  They are in a state of equilibrium

Punctuated Equilibrium

Gradualism vs Punctuated

Similar to gradualism Similar to punctuated evolution