noone is sure even scientists but there's alot because dinosaurs + existing animals + extinct animals = alottt
It's a struggle for existence because the animals have to do many things to survive
camel, buffalo, cow
There are no living specimens in existence.
No, they are still in existence, and they aren't endangered.
land animals
The word that means a species of animals or plants is not longer in existence is extinct. Animals that are no longer plentiful, might be called endangered.
The thought that animals too have rights, and are not to be killed at a whim.
it is extinct
fossils
There are plenty of animals that dont exist. :P
When Pangaea was in existence, the main animals were reptiles and amphibians. During this time, birds developed also.
the corect answer is fossils