Loading presentation...

Present Remotely

Send the link below via email or IM

Copy

Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.

DeleteCancel

Make your likes visible on Facebook?

Connect your Facebook account to Prezi and let your likes appear on your timeline.
You can change this under Settings & Account at any time.

No, thanks

NATURAL SELECTION AND THE PEPPERED MOTH OF ENGLAND

No description
by

Jessica Kim

on 29 January 2013

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of NATURAL SELECTION AND THE PEPPERED MOTH OF ENGLAND

NATURAL SELECTION AND
THE PEPPERED MOTH OF ENGLAND Case Study by Jessica Kim What Is
Natural Selection? Peppered Moth has to be adapted to the polluted environment He released the pale and black moths into two different forests Result The unequal survival and reproduction that results from the presence or absence of particular traits


It is firstly described by Charles Darwin to explain how it influences on the characteristics of populations to change. In the 1950s, H.B.D. Kettlewell of England's Oxford University did an experiment concerning a species of peppered moth. It was
nocturnal and eaten by birds The increasing number of dark moths
=
The increasing number of polluting factories They had to camouflage against the blackened trunks so they can less likely be seen by predators such as birds. Birmingham in central England (severely polluted)

&

Southern England’s Dorset Country ( No pollution ) In unpolluted Dorset – twice as many pale moths as dark moths were captured

In polluted Birmingham – twice as many dark moths were captured Peppered Moth
of
England - History 1. Until the mid-nineteenth century people have reported only pale, speckled peppered moths.

2. 1845 - they found a dark gray specimen

3. As the time passes, the dark gray moths were found more often

4. By the 1950s, most of them were dark gray moth Air pollution turned the trunks of trees from
white to black He placed hidden cameras n filmed how the birds react in both forests.

Consequently, birds more frequently ate the moths that did not coincide with the color of the tree trunks. Is this unequal survival due to predators ? In conclusion, he theorized birds were the cause of natural selection that brought the evolution of dark coloration in these moths. As dark moths survive more in a polluted area,
they gave more birth to their offspring than the pale moths do, so the next generation was comprised of more dark moths, so its population increases EVOLUTION
Full transcript