Random question?

What is the main function of the circulatory system?

Random question?

A species of bird has not been seen since the 1900s and is considered extinct. Which evidence would best disprove the claim that the bird is extinct?

Random question?

In a comparison of metals to nonmetals, metals tend to have

Random question?
People may remove fallen trees from forests to reduce fire risk. Removing the trees is now thought to have an impact on the health of the forest. Which impact would removing fallen trees from forests most likely have on forest health?