The category called "Dolphins and Porpoises" can you found via this link:
The study of dolphins falls under the category of cetology.
whales
We do have the category Questions About WikiAnswers and a category Questions about Answers.com Questions get put in misc or uncategorized when a user does not choose a category.
No, dolphins are in the mammal category
Yes, dolphins are animals. They fall in the mammalia category as well.
The supervisors for the 'Questions about WikiAnswers' category are Kamuna and Dino10.
When on the category home page (not the category topic page) you should see all the answered questions. To get to the unanswered questions in the category there is a link to unanswered questions above the name of the category. If you are not seeing a list of questions you probably are looking at the topic page instead of the category homepage and will need to use the browse categories page to get to the category homepage instead.
"WikiAnswers Local" is a placeholder category for questions about certain countries. No new questions should be added to the main "WikiAnswers Local" category.
The most popular topic would be the Uncategorized category, which has a whopping 11,817,405 questions as of October 18, 2014. The next most popular category is the Math and Arithmetic category with 1,400,706 questions. The third most popular category is the Celebrity Births Deaths and Ages category with 1,029,523 questions.
We have a category for the Olympics. That category has many sub-categories. Take a look around the category and pick questions you can answer.
Click "Browse Categories" on the left under Site Tools, and then search for an Animal Category. In that category, click "Unanswered questions" and you will be taken to a list of all the Unanswered questions in that category.
You can find the most amusing questions in the 'Most Amusing questions ever asked on WikiAnswers' category. There is an entire category dedicated to amusing questions. Search for that category when you click the 'browse our ... categories' on the home page, and you should find that category.