In multicellular plants, the structural functions of cell junctions are instead provided for by cell walls.

They found more than 300 fossils of leaflike multicellular plants that lived on the sea floor 1.7 billion years ago.

The multicellular plants, or metaphytes, are believed to have appeared 1.3 billion years ago.

Not all cells in a multicellular plant contain chloroplasts.

Many protists reproduce sexually, as do the multicellular plants, animals, and fungi.

All multicellular plants have a life cycle comprising two generations or phases.

In the last billion years, simple multicellular plants and animals began to appear in the oceans.

At only 82 megabases, the genome is exceptionally small for a multicellular plant.

The rise of multicellular plants, animals, and fungi allowed vast increases in life's complexity.

Similar mechanisms are likely to be involved in all other multicellular plants in which hardening occurs.