1)Why are mammals called the most advaced animal

            Mammals are considered the most advaced and aer probably the most popular class. They are only that process ture hair and the capacity to produce milk.their superior brains,warmblood and the way they care for their young have given them a great advantage over other animals in the struggle for survival.The overall sucess of mammals as a group is due to thire ability toadapt to virually every environment on earth.Although most species live on land some have taken to the sea and air as well as underground.Is it any wonder that  many scienitists consider mammals as the dominant animal of the world.

2)Why are most marsupials found in ausralia

               Millions of years ago all the marsupials lived on one huge continent. Over time this large continent broker in to smaller pieces.The marsuoials remained on only two of the pieces those that now from south america and australia.Gradually some of the south american marsupials moved north to live in north america.Many of the american  marsupials died out when more modern mammals like  horses and cats developed .The only marsupial now found in america is the opossum.However since australia is an island situated very far away from the other continents the morden mammals could not reach it easily.As a result most marsupials todsay are found in astralia.

3)How are Bactrian camels different form dromedary camels

                    Dormedary is the name for one-hump camels.This type camels is common to africa and middel east.Bactrian camels on the dobi desert in mongolia and have two humps.Bactrian camels differ from dromedary camels in other way too.For example the bactrian camel grows a thick coat  of hair each winter.That coat  of hair falls off every spring.This is to deal with the extreme variation of temperature in the gobi desert.The dromedary camel on the other hand has a uniform length of hair all year round.Dromedary camels are not found in the wild while afew wild bactrian camels still exist in the gobi desert. Finaly bactrian camels are much more mild-mannered than the hot-tempered dromedary camels.

4)Too many to count 

           Threr are more than 4200 species of mammals.All but two give birth to live young .The other two the duck biller platypus and the echidna-hatch their young from eggs.

Up side dwon

        Bats hang upside down because they cant stand right side up .Their leg bones are too thin to hold up their