46. Short answer questions VIII

 

a. Animal diversity does imply that they have diverse ancestry, because common ancestry severely limits diversification.

 

b. If the creatures share the same habitat, they are likely to evolve through speciation or geographical isolation.

 

c. Animals with a similar ancestry have developed new features, resulting in distinct animal groups.

 

d. Animals have a wide variety of structures, but they most likely do share a common ancestor because this could significantly increase the extent of diversity.

e. The likelihood of these diverse animals evolving through geographical isolation and speciation is also low because so many of them share the same habitat. Therefore, it is unlikely that all animals share a common ancestor.