What I find funny is that you actually think that all of the species of animal plant and marine life that we see on this planet today were somehow derived from the population of Noah's ark.
Not millions of years of evolution, oh no.
Absolutely. I thinks it even more funny that you think all the species evolved from a rock in a pool of water got struck by lightning or something like that....then evolved into all the species we see today.
Where did Noah find the marsupials? Polar bears? Poison dart frogs?
Noah didn't find the animals. The bible say they came to Noah.
The pre-flood world was pretty much one giant "Pangea" super continent pre flood...which broke up later on.
Who on the ark specialised in veterinary care?
The bible doesn't say. Was Noah suppose to give the animals rabies shots? I'm not quite sure what you're getting at and how this question "sinks" the biblical ark.
How did they deal with atrophy?
Why would there be atrophy? Are yo claiming the smaller animals were packed into tiny pill boxes and couldn't move around? Are you claiming the larger animals such as the elephant and oxen couldn't be used to turn fans...perhaps to help in the ventilation or raise an lower a dumbwaiter lift system...I'm not quite understanding your atrophy question.
Are you suggesting the little monkeys should have worked out with little bar-bell sets? Pumped Iron?
Where were mountains of food for the animals stored?
In the food storage bins and rooms. Are you saying there would be enough room on the ark for all the food?
The good news is once the animals ate a lot of food Noah and his family had room to set up a basketball court.
How did they dispose of mountains of animal waste?
I love your terminology "mountains" of this and "mountains" of that...as if this language and question assumes that was the condition on the ark. Perhaps they had Mountains of Dew to drink to get them going in the morning.
But as to the "mountains" of waste....there was no mountains of waste.
Think about it...if you were Noah would you engineer against this problem? Would you build cages and pens with slotted floors for the "animal waste" to fall through...collect it in gutters...where it could be easily pulled and removed by Noah, his 3 boys their 3 wives and Mrs. Noah?
There's all kinds of means to remove the waste..collect in then dump it overboard through a hatch or moon pool.
Perhaps you picture the elephants wearing diapers.
How did they stop disease, parasites etc?
Noah had a "Warp Speed" program that developed a jab to fight off the disease and parasites.