You've come across a small, sessile organism sprouting from the ground. You're not sure if you've found a fungus or a plant. Which of the following test could help you determine this?

A.) Identifying the presence of mitochondria
B.) Chemically testing what the cell wall is made of
C.) Identifying whether above-ground reproductive structures exist
D.) Identifying whether reproduction occurs via spores

The cell wall of plants is composed of a structure made of cellulose, resistant and flexible that delimits the cell organelles in a plant cell, besides shaping and protecting against external pathogens.

Fungi, in turn, have a cell wall made of chitin (some have some cellulose in their cell wall as well), a polysaccharide considered the most abundant polymer, second only to cellulose. Chitin can also be found in arthropod carapace.