CHARLES DARWIN A 8 ANNI

CHARLES ROBERT DARWIN 1809- 1872

I THINK

ACCORDING TO HIS STUDIES PUBLISHED IN HIS BOOK THE ORIGIN OF SPECIES,1859, WE KNOW THAT ALL LIVING BEINGS DEVELOP FROM A COMMON ANCESTOR

http://it.wikipedia.org/wiki/File:Phylogenetic_tree_scientific_names.svg

PERHAPS OUR MOST ANCIENT ANCESTOR.

THE TREE OF ANIMALS’ LIFE

THE AMPHIBIANS (AMPHIBIA, LINNEO 1758) ARE A CLASS OF VERTEBRATA BELONGING TO PHYLUM CHORDATA

AMPHIBIANS WERE THE FIRST

VERTEBRATA TO COLONIZE THE

EARTH’S ENVIRONMENT

(TETRAPODI) AND IN THE PAST THEY HAD A GREAT EXPANSION

AND DIVERSIFICATION.

THE DIVERSIFICATION BETWEEN THE TWO MAIN GROUPS, FISH

AND AMPHIBIANS, TOOK PLACE FROM 416 TO 360 MILLION YEARS AGO INTHE DEVONIANPERIOD.

THEIR CLASS NAME DEVELOPS FROM THE FUSION OF TWO GREEK WORDS

MEANING DOUBLE AND LIFE.

A FISH WITH LUNGS DIFFUSED IN AUSTRALIA

IT IS EVIDENT ITS CLOSE RESEMBLANCE TO AMPHIBIANS

THIS CLASS NAME DEVELOPS FROM THE FUSION OF TWO GREEK WORDS ANFI, MEANING DOUBLE AND BIOS MEANING LIFE

BECAUSE THEY SPEND THE FIRST PART OF THEIR LIFE IN THE WATER AND BECAUSE THESE SPECIES PRESENT A LARVAL PHASE VERY DIFFERENT FROM THE ADULT ONE (DEVELOPED THROUGH METAMORPHOSIS)

IN FACT THE NAME ‘AMPHIBIANS’ IS DUE TO THE AMPHIBIANS CYCLE OF LIFE

http://www.google.it/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&uact=8&docid=xYjvu1xbd1IAOM&tbnid=F8zLhhZ2zOMH3M:&ved=0CAUQjRw&url=http%3A%2F%2Fwww.naturamediterraneo.com%2Frospo%2F&ei=kXtgU8KyD4nCPKv2gfAJ&bvm=bv.65636070,d.ZWU&psig=AFQjCNGws05dEJ1RdnxN4R2_XyGsOsBRhg&ust=1398917292372869

IN A LONG GELATINOUS DUCT (GANGA)

6000(SIX THOUSAND) EGGS

ARE SUSPENDED

BETWEEN THE

AQUATIC PLANTS

AND WITHIN THREE MONTHS

EXCEPTIONALLY STRONG WE HAVE HEARD HIS HEART BEAT ... BUT ALSO OUR!

TOUCHING A TOAD IS AN

EXCITING AND WONDERFUL EXPERIENCE

TOUCHING A TOAD IS AN

EXCITING AND WONDERFUL EXPERIENCE