When you define a subclass, like student, and don't supply a constructor, then its superclass must: 1. have no constructors defined2. have no constructors defined or have an explicit default (no-arg) constructor defined.3. have an explicit copy constructor defined4. have an explicit default (no-arg) constructor defined5. have an explicit working constructor defined

This chart shows that all living things on earth evolved from simple single cell organisms overtime more complex multicellular organisms evolved from do you single cells prokaryotes. This claim is supported by the video which states that the diversification of life began with simple single cell organisms that could perform photosynthesis

Explanation: right off of Pluto