What line of evidence would support your hypothesis that the organism is a cyanobacterium?

a. it lacks cell walls.
b. it forms chains called mycelia.
c. it is an endosymbiont.
d. it is able to form colonies and produce oxygen.

D. It is able to form colonies and produce oxygen.

Explanation:

Cyanobacteria are the photoautotrophs and carry out oxygenic photosynthesis. These prokaryotic organisms use water molecules as an electron donor during light-dependent reactions of photosynthesis and release oxygen gas as a by-product.

Cyanobacteria are considered to be the first organisms on the earth to perform oxygenic photosynthesis and are supposed to be responsible for the present-day oxidative atmosphere of the earth. Most of the cyanobacteria are colonial forms and are present as colonies of a large number of cells. However, unicellular solitary forms are also present.

i would say the prokaryotic cells the prokaryotic cells are less complex, are usually found only in unicellular organisms and have more limited capabilities than eukaryotic cells.

doctors i believe if i'm wrong sorry