I once took a biology class from a guy who researched giant sequoias. Giant sequoia cones are serotinous, which means that fire on the forest floor causes them

I once took a biology class from a guy who researched giant sequoias. Giant sequoia cones are serotinous, which means that fire on the forest floor causes them to dry out, which opens and releases their seeds. Without fire, the seed won't reach the earth.