Question

which of the organisms below give support for the colonial theory of animal origins?
spriggina
choanoflagellates
ediacarans
trilobites
club fungi

Explanation:

The colonial theory of animal origins suggests that animals evolved from colonial protists. Choanoflagellates are single - celled or colonial protists. They have a collar - like structure (choanocyte) which is similar to the choanocytes in sponges (the simplest animals). This structural similarity provides evidence for the colonial theory as it implies a possible evolutionary link from colonial choanoflagellates to multicellular animals. Spriggina is an Ediacaran fossil, Ediacarans are a group of enigmatic fossils from the Ediacaran period, trilobites are arthropods (already complex animals), and club fungi are fungi (a different kingdom from animals).

Answer:

choanoflagellates