Similar Questions for How did Giraffes Get Long Necks from Yahoo AnswersQuestionAnswer
I don't think it's quite right. Giraffes have long necks simply because their neck bones are much bigger (they actually have the same number of neck bones as humans). Just by stretching the muscles of the neck, even constantly, isn't likely to cause bigger neck bones or pass on bigger neck bones to your offspring.
I think the answer is that whatever mutation caused bigger bones in the neck allowed those particular giraffes to keep well fed and thereby reproduce to pass on the bigger-neck-bone genes.
C. Giraffes with longer necks survived because they were better suited to the environment.
According to Lamarck theory of inheritance of acquired character, the ancestor of giraffe were horse like lived in africa having enough grass & herbage to eat,when they forced to graze upon leaves of trees,thus by continuous effort of stretching the neck & forelimb increased in each generation to reach this food.
How did Lamarck explain the long neck of a giraffe?Answer
A.Giraffes always had long necks.
B.Only giraffes that eat from the top of trees need long necks.
C.Giraffes used to have short necks but the use of their necks made them grow.
D.Giraffes used to have short necks and suddenly grew long necks.
E.Baby giraffes may be born with short necks or may be born with long necks.
C. Lamarck thought that giraffes would pass on acquired characteristics. He had the right idea that previous generations passed on genes, but a giraffe stretching its neck would not be passed on to the giraffe's offspring. An evolutionary change would take a much longer time than that.