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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
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
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