Plant Evolution and Diversity: Big, Science-y Themes

We know plants evolved from algae, and over time they got more complex. But how is everything related? Why did plants evolve the way they did? And how do we know all this stuff about plant evolutio...

Plant structures are constrained by evolution. Even though evolution can produce new forms, it has to build on pre-existing structures. Let's look at the structures that evolved in plants over time...