Natural Selection

Natural Selection

Warm-up Explain what is going on in this picture in a

short narrative format. Be creative with your story. Include why this species has to change and what you think their next change will be

It is how the EARTH changes over millions of

years!!!

YOU KNOW WHAT GEOLOGICAL EVOLUTION IS , RIGHT???

What THEORY do we follow regarding GEOLOGICAL

EVOLUTION? The THEORY of PLATE TECTONICS!!!!!! You know this! It is that the Earth is

made up of pieces called PLATES. Plates move around the Earth very

slowly on magma, sometimes colliding (converging to form mountains & volcanoes) sometimes diverging (to form wider oceans and hydrothermal vents).

It is how life changes over many thousands of

years!

What about BIOLOGICAL EVOLUTION?

What THEORY do we follow regarding BIOLOGICAL

EVOLUTION?LAMARK had a good theory…

He proposed that living things can acquire (get) new traits throughout their lifetime …

& pass them onto their offspring.

http://www.google.com/url?sa=i&rct=j&q=lamark&source=images&cd=&cad=rja&docid=16nd5IMnHIeU7M&tbnid=uhf-u4H81ngSKM:&ved=0CAUQjRw&url=http://perso.wanadoo.es/cano2004/grandesfilosofos/lamarck.htm&ei=A_9FUfi-NIfC0AHNrYHYDw&bvm=bv.43828540,d.dmg&psig=AFQjCNEleP8zZGUlQnDa92pbq1y4gll0Mg&ust=1363628150717770

Like this giraffe…

http://www.google.com/url?sa=i&rct=j&q=lamark&source=images&cd=&cad=rja&docid=xj5A7ERtqSZqmM&tbnid=7wcaLjJ6ai2sfM:&ved=0CAUQjRw&url=http://p7sts1011.blogspot.com/2011_01_01_archive.html&ei=hv9FUfb-Oe2Q0QHVqIDgBA&bvm=bv.43828540,d.dmg&psig=AFQjCNEleP8zZGUlQnDa92pbq1y4gll0Mg&ust=1363628150717770

While Lamark’s theory fell “short,” it still has some merit in the field of epigenetics.

Some of our genes (DNA instructions) can switch on or off during our lifetimes.

Making it possible for offspring to acquire new “improved” instructions on surviving.

http://www.google.com/url?sa=i&rct=j&q=lamark&source=images&cd=&cad=rja&docid=16nd5IMnHIeU7M&tbnid=uhf-u4H81ngSKM:&ved=0CAUQjRw&url=http://perso.wanadoo.es/cano2004/grandesfilosofos/lamarck.htm&ei=A_9FUfi-NIfC0AHNrYHYDw&bvm=bv.43828540,d.dmg&psig=AFQjCNEleP8zZGUlQnDa92pbq1y4gll0Mg&ust=1363628150717770

What THEORY do we follow regarding BIOLOGICAL EVOLUTION?

DARWIN’s Theory of NATURAL

SELECTION!

http://www.google.com/url?sa=i&rct=j&q=darwin&source=images&cd=&cad=rja&docid=Az15WAlymITqkM&tbnid=BRXR0CqUkTZuZM:&ved=0CAUQjRw&url=http://galapagosonline.wordpress.com/2011/09/15/charles-darwin-in-galapagos/&ei=wwJGUeG-AYWG0QGK5YCoCw&bvm=bv.43828540,d.dmg&psig=AFQjCNH05K5ZJRQrH9wLkKeaoOBybzOObg&ust=1363629109597719

HOW does his Theory of Natural Selection work?

IT HAS FOUR (4) PRINCIPLES:1. 2. 3. 4.

HOW does the Theory of Natural Selection work????

Most living things have more babies than will normally

survive.

This is called:1. OVERPRODUCTION

Here’s some examples of OVERPRODUCTION:

Snapping turtles can lay 30 to 80 eggs at a time!

You do NOT want to hear Maury say:

“You ARE the FATHER!”

BUT THAT’S NOTHING!

SOME LARGE SPIDERS LAY UP

TO TWO THOUSAND

EGGS!

With all these babies, you are bound to have VARIATIONS (differences). [#2]

SOME BABIES WILL BE BIG, SOME SMALL….

SOME BABIES WILL BE SMART,SOME BABIES WILL BE ATHLETIC.

With too many living things around, things are going to get

rough!

THERE’S LOTS OF COMPETITION!!!

With too many living things around, things are going to get rough!

…for status,


http://www.google.com/url?sa=i&rct=j&q=antelopes+butting+heads&source=images&cd=&cad=rja&docid=u2Ui3o7XNEIiLM&tbnid=eJuU2_SYhcacHM:&ved=0CAUQjRw&url=http://www.bighorn.org/photogallery.html&ei=-gZGUf-HGIaM0QGJ6YDYBw&psig=AFQjCNH9aXfhBrk0V6qVH9SwqFl4NIUvkw&ust=1363630121586805


…for space …opportunities,


http://www.google.com/url?sa=i&rct=j&q=fighting+for+space&source=images&cd=&cad=rja&docid=mq0kLzE3k0Yd8M&tbnid=wd-UXOqfNwSJGM:&ved=0CAUQjRw&url=http://www.123rf.com/photo_11809687_photo-of-paparazzi-fighting-for-space-to-take-photos.html&ei=bQdGUfc6wejSAb_TgOgO&psig=AFQjCNGKeiNdL6oKh4M8OOrN-1ivcQVD2w&ust=1363630299874105


…for food!


http://www.google.com/url?sa=i&rct=j&q=fighting+for+food&source=images&cd=&cad=rja&docid=YDofLxy4FAZ2qM&tbnid=iQu-YXypwemLKM:&ved=0CAUQjRw&url=http://www.dailymail.co.uk/travel/article-1244118/Haiti-earthquake-disaster-Cruise-ships-continue-visit-despite-rising-death-toll.html&ei=xwdGUeL-Mci30QHamIDoDQ&psig=AFQjCNF7vQdeO75I9T_eKXodra8VuHiXJA&ust=1363630392455436


…for mates!


http://www.google.com/url?sa=i&rct=j&q=fighting+for+mates&source=images&cd=&cad=rja&docid=0l9mqXBXFdDQcM&tbnid=8ehc_OIQN555mM:&ved=0CAUQjRw&url=http://www.nikondigital.org/content/content/breakthrough-teleconverter-consumer-d-slr-lenses-0&ei=2ghGUZvgLeOU0QHw9YHICw&psig=AFQjCNF_HC6yHLzFMsRhkw2jqR6_QATBJg&ust=1363630533087651


…for LIFE!


http://www.google.com/url?sa=i&rct=j&q=fight+for+survival&source=images&cd=&cad=rja&docid=n4PoDWBT-yzt8M&tbnid=LmCfEkZmIL3WqM:&ved=0CAUQjRw&url=http://pichaus.com/showcase-raw-survival-wild-@2063efc940fb940afc337c40ae30f805/&ei=KApGUbbXIsi80QHyvIGwBg&psig=AFQjCNHaqnx1R_V-BDh3xgEyZ6TwsNaH7Q&ust=1363631007783692

In nature, COMPETITION does NOT always favor the mighty.

Sometimes it is the LUCKY or MOST PREPARED who win!

THIS GOES ON FOR GENERATION AFTER GENERATION AFTER

GENERATION AFTER GENERATION…

AND SO IT GOES, THROUGH NATURAL SELECTION, A SINGLE SPECIES OVERPRODUCES VARIATIONS OF

OFFSPRING (some with mutations) WHO THEN MUST COMPETE TO MAKE MORE BABIES!

AFTER HUNDREDS OF THOUSANDS OF YEARS,

SCIENTISTS BELIEVE A SPECIES CAN EVOLVE INTO ANOTHER NEW,

MORE SUCCESSFUL SPECIEs!!!!!

After MANY THOUSANDS of YEARS, a single species undergoes ADAPTATION (#4) where its entire race takes on fresh

characteristics of the most successful competitors selected of its kind!!!

Key words for the THEORY of NATURAL SELECTION:

1. OVERPRODUCTION (too many babies than will survive)

2. VARIATION (all with different traits plus occasional genetic mutations)

3. COMPETITION (selection of a winner)4. ADAPTATION (over many, MANY

generations these most beneficial traits endure (last)!)

SURVIVAL OF THE FITTEST!

That’s why we call the Theory of Natural Selection…

http://www.bebo.com/PhotoAlbums.jsp?ProfilePhoto=Y&MemberId=4887859122

Natural Selection

Documents

living things

theres lots of competition

lamarks theory

darwins theory of

biological evolution

theory of plate tectonics

thousands of years

geological evolution