The answer is false there were only types the saurischians and the ornithischians.
The heaviest bird of prey is the <span>condor. </span>
The units of evolution are populations and not individuals because a variation or a mutation in an individual is not sure to last or produce offsprings having the same variation or mutation. The proof that a species has truly evolved is when the variation has allowed the species to survive its environment and produce generations carrying the same variation.
