Answer: no
Explanation: cubic inches
I believe the inability to make saliva would affect digestion drastically. The first phase in the process of digestion comes with saliva - it breaks down some substances in your mouth, because it contains amylase which helps during this process. If it weren't for saliva, you probably wouldn't even be able to swallow food - and even if you did, it would be almost impossible to break it down in your body.
Answer:
survive
better adapted to the environment allows organism the live and surviv more likely.
Mountain ranges often appear on the edges of continents.
Fossils of the same animals appear on different continents.