Species is often defined as:

anything one wants
anything that produces offspring
a group of naturally interbreeding organisms
a group with a similar niche
B and D

Question

Species is often defined as:
  
anything one wants
anything that produces offspring
a group of naturally interbreeding organisms
a group with a similar niche
B and D

chris · Answer

wow this question is a lot more comlicated than I thought =) http://en.wikipedia.org/wiki/Species#Definitions_of_species

chris · Answer

I think you should read the definition from your textbook if you have it nearby to see if it picks a definition.

anonymous · Answer

d is wrong. different species can occupy the same niche, like two thermophile bacteria
b is wrong as a donkey and a horse can interbreed  i think that the hybrid is a mule. sorry i am not a native english speaker
a - dont know how to relate
c sounds right by positive selection as well as elimination above

anonymous · Answer

I would think C a group of naturaly interbreeding organisms