Eukaryotic secondary plastids are the result of an endosymbiotic event that involved (blank) as endosymbionts. Since this original endosymbiotic event, some DNA may have been exchanged between the two symbiotic partners in a process called (blank)

The correct answer is - Cyanobacteria; Horizontal gene transfer

Explanation:

According to the endosymbiotic theory it is believed that the eukaryotic plastids (mitochondria and chloroplasts) have developed from symbiotic bacteria, such as cyanobacteria and alpha-proteobacteria.

During this symbiotic process, some genetic material may have been move in between the symbiotic counterparts in a process called Horizontal gene transfer or lateral gene transfer.

thus, the correct answer- Cyanobacteria; Horizontal gene transfer

b. heterotroph

explanation:

i might be wrong but i think its a. let me know if i’m right and have a good rest of your day!