Date post: | 18-Dec-2015 |
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ONE WAY ORGANISMS MAY ADAPT TO
DEMANDS FROM THE ENVIRONMENT…
camouflage
CAMOUFLAGE•Camouflage allows organisms to survive and adapt to their environment•Hide to escape•Hunt without being seen•Warning
CONCEALING COLORATION
•Polar bears and snow….• Snow hides the polar bear
OTHER WAYS TO CONCEAL…
• Artic hare change fur color as the seasons change• Chameleon
changes color according to environment
TO CONCEAL, THE ANIMAL HAS TO BE IN THE CORRECT ENVIRONMENT
PEPPERED MOTHS OF ENGLAND
Before Industrial Revolutionwhite moth was favorable
black moths did not blend in(mutant)
During the I.R. thelichens are killed off trees>>being the black moth was now better!
Yummy
Allele frequency changes over time
PEPPERED MOTHS OF ENGLAND
• http://www.youtube.com/watch?v=LyRA807djLc
DISRUPTIVE COLORATION
• Color breaks up surrounding•Distracts the eye from the animal outline
• Leopard in the jungle • Tiger on the hunt
IS IT ONE BIG ANIMAL???
WHERE IS THE HEAD? HOW MANY EYES DOES IT HAVE?
MIMICRY--COPYCATS
• By disguise---look like other animals
Hawk Moth---makes itself look like a snake
MIMICRY
• The Indonesian Mimic Octopus
• http://www.youtube.com/watch?v=H8oQBYw6xxc
COUNTERSHADING
•Dorsal (upper) side is darker than the ventral (lower) side
ADVERTISING•Monarch taste bad to birds
Blue jay spitting out Monarch butterfly
•Visceroy looks like Monarch and does not get eaten
WHICH ONE IS POISONOUS?
WARNING COLORATIONPipevine Swallowtail Caterpillar
Box Jellyfish
Poison Dart Frog
Cuttlefish