Lichens result from symbiosis between a fungus and
a. photosynthetic bacteria.
b. euglena.
c. photosynthetic algae
d. both (a) and (c)

D. both (A) and (C)

Explanation:

Lichen is an organism formed from the symbiotic association between non photosynthetic fungi and photosynthetic algae or bacteria.

The algae provides food (through photosynthesis)  to the fungi while the fungi in return absorbs water and other materials that the algae need to carryout photosynthesis.

The correct option is D.

you know they are heterozygous for a trait because they have it as jj or jj.