Bacteria in nature are usually found in complex multicellular structures, called biofilms.

Bacteria are often found living in aggregated multicellular communities known as biofilms.

While the vast majority of bacteria are single cells, they are multicellular.

One of the simplest multicellular animals, illustrating the beginning of a body.

Some microorganisms attempted multicellular arrangements, forming small sheets or filaments of cells.

They completed and published the blueprint for an entire complex, multicellular organism.

Early during evolution multicellular organisms explored the advantages of a symbiotic life.

This compares well to different tissue types found in multicellular organisms.

The sponges, the lowest of the multicellular animals, were represented by several orders.

Cellular differentiation is part of the developmental process of multicellular organisms.

Effective antiviral protection in multicellular organisms relies on both cell-autonomous and systemic immunity.

Characterization of individual cell types is fundamental to the study of multicellular samples.

These arise from the axial cell, and are multicellular and branched.

Tissues of multicellular organisms consist of stem cells and differentiated cells.

Thus, as in indubitable multicellular animals, division of labour has begun.

The innate immune defence of multicellular organisms against microbial pathogens requires cellular collaboration.