why do fetal pigs have sensory papillae for bitter taste on the tongue?

Question

i have no idea. maybe so they won't eat something bad?

Since this is not my area of expertise, I searched Google under the key words "bitter taste function" to get these possible sources:

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=pubmed&list_uids=10761935
http://www.sciencedaily.com/releases/2006/09/060918165721.htm
http://www.accessexcellence.org/WN/SUA14/taste42k.html

This was only after trying key words like "fetal pig," "papillae," "taste," and "bitter" in various combinations.

In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search.

I hope this helps. Thanks for asking.