so evolved to be longer. One theory is that past selective pressures may have forced both sexes to increase their neck sizes, but that pressure may no longer be identified. Secondly, the female neck size could have evolved from the genetic components of the female and male mating (Simmons 783). In conclusion, Simmons and Scheepers may not have backed up their theory completely, but they make it obvious that feeding alone can not be the reason that longer necks evolved. This is shown through the way that the animals feed and the disproportionate increase in neck length compared to other components within the giraffe. The evidence presented in this case offers much more support for the idea that sexual selection is responsible. However, much more investigation must take place in order for the theory to be considered acceptable. ...
