Their large size is naturally selected for. This is definitive biological change.
"The changes in populations that are considered evolutionary are those that are inheritable via the genetic material from one generation to the next."
Two big cats which were naturally selected for have big kittens (its not that simple, but its all that is needed for the unschooled responding here). Therefore evolution works fine in this context.
"The changes in populations that are considered evolutionary are those that are inheritable via the genetic material from one generation to the next."
Two big cats which were naturally selected for have big kittens (its not that simple, but its all that is needed for the unschooled responding here). Therefore evolution works fine in this context.