Algae

Embryophytes

Rhodophytes

Diatoms

Chlorophytes

Species Plantarum (1753) is the starting point for modern botanical nomenclature.

increased hybrid viability

gametic isolation

the postzygotic barrier called reduced hybrid viability

the postzygotic barrier called hybrid breakdown

the prezygotic barrier called hybrid sterility

That bilaterally symmetrical animals are more closely related to each other than they are to radially symmetrical organisms.

That jellyfish are more closely related to bees, than sponges are.

That birds are more closely related to starfish than to butterflies.

That earthworms and more closely related to squid than to nematode worms.

That all organisms with a true coelom are more closely related to each other than to those with a pseudocoelom.