[b said:
Quote[/b] ]So why isn't there any creature that has features of both plants and animals or between humans and animals?
first of all, humans ARE animals.
secondly, there are creatures that are both fungus and animal like, and others that are algae and animal like.
For example... euglenas are both animal and plant like. They can eat by endocytosis or they can photosynthesize. They can also move around like animals and yet they are green like plants.
There are also fungus-like protists (slime molds) that move around but reproduce by spores and stuff.
and there are animal-like protists (protozoans) which only have a single cell and act more like animals.
They're a pain for taxonomists to categorize. Some people group them as plants, others as animals, others as fungus, etc...
Same with the prehistoric humans. Some people consider homo erectus a human, and others consider it an ape. How much more "missing link" do you want?
There are organisms that eat rocks by the way... but you can't expect animals to suddenly evolve like that. This is science, not science fiction. You will never have a turtle suddenly be born with wings, able to eat radioactive waste, and breathe without air.
we're talking about the REAL world here people! Not every animal is fossilized and species don't just evolve into superman in two days!!