The Story of Natural Selection and the Peppered Moth

Slides:



Advertisements
Similar presentations
Natural Selection in Action
Advertisements

Natural Selection Is the process by which organisms that are better adapted to their environment survive and breed while those less well adapted fail to.
Aim: What is Darwin’s Theory of Natural Selection ? Do the activity with your group. Look at the picture, discuss and answer the questions. How did this.
Introduction: Is population size a critical component to evolution? Are there differences in the evolutionary pressures on small populations versus larger.
Peppered Moth Lab.
The History of Evolution
Peppered Moth.avi. Peppered moth Moth comes in two “versions”:
Syllabus content e) Evolution occurs via natural selection: ■ individual organisms within a particular species may show a wide range of variation because.
Scientists who studied Natural Selection
Natural Selection Is the process by which organisms that are better adapted to their environment survive and breed while those less well adapted fail to.
Natural Selection. Learning intentions I know that sexual reproduction results in variation in a population I can explain natural selection as survival.
National 5 Biology Course Notes Part 4 : Adaptation, natural selection
10.3 Theory of Natural Selection KEY CONCEPT Darwin proposed natural selection as a mechanism for evolution.
Charles Darwin An English Naturalist – studied animals and their environment how different species interact with their environment Natural selection.
Notes 7-1 Charles Darwin. Darwin’s Voyage Charles Darwin was an English Naturalist who sailed on the Beagle, from England to the Galápagos Islands. Changes.
1 Natural Selection in Action 2 Most mutations produce inferior versions of original gene Some mutations allow adaptation to a changing environment Mutant.
The Story….. Evolution in Action. 19 th century industrial Britain *Increase in pollution, smog and soot. *Tends to stick to things.
Darwin’s Dangerous Idea. 1.Earth Is 10,000 Old (Ussher) 2.Species are fixed Pre-Darwinian beliefs 1.Earth Is MUCH older (Buffon) 1.Sudden changes; catastrophism.
The Story of the Peppered Moth Laura Candler: Hands-On Science.
From the previous lesson on mutation you should be able to: state what mutations are explain how mutations occur Adaptation, natural selection and the.
How did Peppered Moth changed over time during industrial revolution?
This is a Peppered Moth. They are common in many areas of the world including the United States.
INDUSTRIAL MELANISM.
What is a Theory? Everyday Language – Hunch; Guess Scientific Language – Created after years of experiments and observation – Based on testable evidence.
The peppered moth is a common insect in Britain with two forms: the dark form and the light form. The light form has small black specks just like it has.
Essential idea: The diversity of life has evolved and continues to evolve by natural selection By Chris Paine The image.
The story of the peppered moths. Once upon a time, there was a specie of moth called the peppered moth.
NATURAL SELECTION IGCSE Biology Revision Notes. Darwin’s Original Idea 1. Individuals in a species show a wide range of variation 2. Variation is caused.
EVOLUTION BY WAY OF NATURAL SELECTION. VOCABULARY Species – a type of organism. Reproduction within a species creates the same species. Extinction – the.
The Theory of Natural Selection Artificial Selection Humans created diversity choosing specific traits to breed – Dogs, Crops, Livestock Humans selected.
The Theory of Natural Selection Artificial Selection Humans created diversity choosing specific traits to breed – Dogs, Crops, Livestock Humans selected.
The Theory of Natural Selection Artificial Selection Humans created diversity choosing specific traits to breed – Dogs, Crops, Livestock Humans selected.
Peppered moth Moth comes in two “versions”: Pre-Industrial Revolution Pre-industrial England was known for rolling hills, dense green forest, and.
Evolution terms & Pictures
Natural Selection and Adaptations
ADAPTATIONS OVER TIME 1. A species is a group of organisms that can mate and produce fertile offspring. 2. A fossil is the preserved remains or traces.
Peppered Moth Study Industrial melanism is the term used to describe the adaptation of an organism in response to industrial pollution. One example of.
Quick Review: What is evolution?
5.1.U3 Selective breeding of domesticated animals shows that artificial selection can cause evolution. Selective breeding (also called artificial selection)
Higher Biology Evolution Mr G R Davidson.
Essential Question #2 Lesson #2
Christianity, Belief & Science
Natural selection Today we are learning that the better plants and animals are adapted to their environment the more likely they are to survive.
5.1 Evidence for evolution
The Theory of Natural Selection
Natural Selection and the Peppered Moth
The Peppered Moth Simulation
15.1 Evidence for Evolution
The Theory of Natural Selection
Evolution in action.
Natural Selection and Adaptation
Evolution Change Over Time.
Natural Selection Pt 2 -Genetic changes can result from gene recombination during gamete formation and from mutations -These events are responsible for.
Short Term Evolution in the Peppered Moth
Directions 5/17/18 Get out your big “Natural selection notes” & fill in box about the BEETLES! Then cut out the parts to the story…we will use these.
The History of Evolution
Charles Darwin An English Naturalist – studied
Natural Selection and Adaptation
The Theory of Natural Selection
Evolution of the Peppered Moth
A change in a species over a long period of time
Evidence of Evolution by Natural Selection
07 Evolution FT.
Natural Selection Example & Extra Key Points
The Theory of Natural Selection
Natural Selection and Adaptations
INDUSTRIAL MELANISM IN THE PEPPERED MOTH
More on Natural Selection Bio Standard 8a, 7a, b, and c
Natural Selection and Adaptation
The Peppered Moth.
Presentation transcript:

The Story of Natural Selection and the Peppered Moth

The English Peppered Moth, Biston betularia, flies at night and rests on lichen covered trees during the day. Just like how humans can have red or black hair, the moth comes in two forms of the same species - a pale speckled version which blends in with the light colored lichen on the trees, and a black, or melanic, version which is easy to see on the light trees.

Before the Industrial Revolution, trees were covered in light colored lichen and the pale form was easily camouflaged during the day. The melanic form was a dark contrast to the light background so birds easily found them and they were eaten more frequently. As a result, they were less likely to survive and pass their genes on to the next generation which made this form of moth rare within the population.

In the late 1700s and early to mid- 1800s, the Industrial Revolution created air pollution so thick that it killed the lichens and covered the trees in black soot.

As a result, the pale moths stood out against the black background and birds caught them more easily while the melanic form was well- camouflaged allowing them to survive, breed, and pass the dark coloration on to their offspring. The melanic moth became more common among the peppered moths due to selective pressure the birds put on the population due to their inability to find camouflaged forms.

In the 1950s, pollution became regulated (by the Clean Air Act) and as a result, the trees took on their original appearance and lichens again flourished. As a result of reverse selective pressure, the melanic form decreased while the pale form increased in numbers. It is expected that with the current trend, the gene for melanic moths could be completely eliminated from the peppered moth population within the next few years.

#2 During Industrial Revolution #1 Before Industrial Revolution #3 After Clean Air Act was passed and smog went away The peppered moth story provides evidence for changes of frequencies of different forms of a species within a population. However, it does not show large scale Evolution.