Members of which group(s) can be single-celled producers? ?

Unicellular organisms

anti-human il13 stable cell line (lebrikizumab) can be provided from creative biolabs.

explanation:

some fungi obtain their nutrients from a living host (plant or animal) and are called most biotrophic fungi have fairly narrow host ranges—they are specialized on a limited called rhizomorphs that allow the fungus to grow from one tree to another. ascospores are formed inside a sac-like structure called an ascus. so your answer is a