Evolution: Natural Selection

Slides:

Advertisements

Similar presentations

1) What would happen to the population size if the average female produced more than one surviving reproducing daughter? A) there would be more females.

Advertisements

Evolution.  Darwin proposed that species had evolved by a process he called, natural selection. Darwin described natural selection as the way in which.

1.2: Most Genes Do Not Function Alone

16.2 Applying Darwin’s Ideas

Evolution/Adaptations MA Curriculum Strands

NATURAL SELECTION. EVOLUTION the mechanism of evolution  organisms that are better suited to survive in a given environment are more likely to survive.

A Closer Look At Darwin’s Idea of Natural Selection

Darwin Presents His Case 15-3

| resources for science teachers who like to think TopicEvidence for evolutionLevelA Level Outcomes1.To.

Natural Selection And other mechanisms for Evolution.

Adaptations to the Environment. Adaptations  Any trait that helps an organism survive in its environment.

Nothing in biology makes sense except in the light of evolution. – Theodosius Dobzhansky Evolution Charles Darwin in later years.

AIM: How do comparative studies help trace evolution?

Nothing in biology makes sense except in the light of evolution. – Theodosius Dobzhansky Evolution Charles Darwin in later years.

Biology EOC Review Evolution. Evolution Explain biological evolution as the consequence of the interaction of population growth, inherited variability.

Unit 7-Change with Time (Evolution). Evolution ► Change With Time ► The development of new types of organisms from pre-existing types of organisms over.

Chapter 22 Descent with Modification: A Darwinian View.

Natural Selection. Evolution by Natural Selection.

The Story of the Frigeaf.

History of Evolution Chapter 9. Which came first?

How did such tremendous diversity of life come to exist on this planet?

Evolution The Big Picture. Darwin’s alternative explanation to Special Creation - Evolution "In the broadest sense, evolution is merely change … Biological.

Diversity, Adaptation and Change in Ecosystems. Selective Advantage?

Natural Selection. A. Species overproduce offspring that may survive an environment. B. There is little variation among members of a population. C. Competition.

Evolution and Natural Selection. Jean-Baptiste Lamarck French biologist known for his idea that acquired traits are inheritable.

Grant Rios Clae Macke. WHAT IS EVOLUTION? Gradual process in which something changes into a different and usually more complex or better form. Change.

The Theory of Evolution by Natural Selection

Natural Selection and Evolution

Darwin’s Theory of Natural Selection

Evolution and natural selection

Natural Selection Lab 14.

OUTLINE 21 POPULATION GENETICS I. The New Synthesis A. Challenge

Evolution and Natural Selection

Chapter 16: Darwin’s Theory of Evolution

Basics of Evolution.

Theory of Evolution Chapter 15.

Mechanisms of Evolution

Mechanisms of Evolution

Natural Selection Vocab Review

Population Variation.

Biological Bases of Behavior Northwest High School

September Journal: What is a theory? Are theories always true?

1) What would happen to the population size if the average female produced more than one surviving reproducing daughter? A) there would be more females.

Mechanisms of Evolution

ORIGINS OF EVOLUTIONARY SCIENCE

Introduction to Evolution

Evolution, Darwin & Natural Selection

Diversity of Life Species Gene pool.

Natural Selection Natural selection: organisms with favorable traits for a particular environment survive, reproduce, and pass these traits on to the next.

Mechanisms of Evolution

History of Biological Diversity Evolution: Darwin’s travel

The Theory of Evolution by Natural Selection

Populations Change Over Time through Natural Selection

III. Darwin’s Theory of Natural Selection

Natural Selection.

III. Darwin’s Theory of Natural Selection

Natural Selection.

Take this time to work on your Pangea Puzzle

Evolution Notes.

change in the heritable traits within a population across generations

Lesson Overview 17.1 Genes and Variation.

SURVIVAL OF THE FITTEST

WATCH Evolution in the Galapagos

Natural Selection in Action

Lecture #30 Darwin and Evolution.

Biology: Life on Earth (Audesirk)

Darwin & Natural Selection

Presentation transcript:

Evolution: Natural Selection Diane Philip

I. Definition of Evolution Evolution is an inherited change in a group of organisms through time. This changes the phenotypic ratio of a population over time. Inherited: genetic transmission of information Group: no such thing as an individual evolving Time: evolution is a process occurring over generations

II. Differential Reproduction Observation 1: Populations over-reproduce even though resources are limited. Conclusion 1: There will be competition over these resources and some organisms will survive to reproduce, while some will not.

II. Differential Reproduction Observation 2: Individuals in a population vary and some of that variation is heritable. (ex. color of fur) Conclusion 2: Organisms that are well-suited to the environment will be more likely to reproduce than others, passing on these well-suited traits (if the trait is heritable). The next generation will most likely have a higher proportion of those traits. This is known as differential reproduction.

Differential Survival and Reproduction among the chickens

III. Evidence Homologous structures are shared traits the result from common ancestry. This means they evolved from the same structure and have a similar function.

III. Evidence Analogous structures are shared traits that result from similar environmental demands, not from common ancestry (convergent evolution). This means that they have a similar function but evolved separately.