Question

select all that apply
select all cell shapes that have been observed among the archaea. more than one answer may be correct.
rods
cocci
spiral shapes
mycelia
spirochetes

Explanation:

Archaea exhibit various cell shapes. Rods (bacilli - like), cocci (spherical), and spiral shapes are observed in archaea. Mycelia are filamentous structures of fungi, not archaea. Spirochetes are a type of bacteria, not archaea (though some archaea can have spiral forms, but spirochetes as a group are bacterial; however, the "spiral shapes" option for archaea is correct as archaea can have spiral morphology). So rods, cocci, and spiral shapes are correct.

Answer:

A. rods, B. cocci, C. spiral shapes