When I was in college, I lost my scholarship one year. I had enough money for tuition, but not room and board. So I camped in the hills.
Individual ambition is undoubtedly a strong motive in student work, but there is such a thing among students everywhere as ambition for others, call it class spirit, esprit de corps, good fellowship, or good will to men.
The juvenile sea squirt wanders through the sea searching for a suitable rock or hunk of coral to cling to and make its home for life. For this task, it has a rudimentary nervous system. When it finds its spot and takes root, it doesn't need its brain anymore so it eats it!