Mark all correct statements about the supergroup Archaeplast

Mark all correct statements about the supergroup, Archaeplastida:

a. Archaeplastida includes species whose ancestors became photosynthetic through secondary endosymbiosis.

b. Archaeplastida includes species whose ancestor became photosynthetic through primary endosymbiosis

c. [Do not select this choice]

d. Archaeplastida includes all species thought to have descended from a heterotrophic cell that engulfed a cyanobacterium which became an organelle within that cell

Solution

(A)Archaeplastida includes species whose ancestors became photosynthetic through secondary endosymbiosis

(B)Archaeplastida includes species whose ancestor became photosynthetic through primary endosymbiosis.

(D)Archaeplastida includes all species thought to have descended from a heterotrophic cell that engulfed a cyanobacterium which became an organelle within that cell.

Since the tribal archaeplastidan is estimated to have gained its chloroplasts straightforwardly by immersing cyanobacteria, the occasion is known as an essential endosymbiosis (as reflected in the name decided for the gathering \"Archaeplastida\" i.e. \'old plastid\'). Prove for essential endosymbosis incorporates the nearness of a twofold layer around the chloroplasts; one film had a place with the bacterium, and the other to the eukaryote that caught it. After some time, numerous qualities from the chloroplast have been exchanged to the core of the host cell. The nearness of such qualities in the cores of eukaryotes without chloroplasts proposes this move happened right on time in the advancement of the gathering.

Different eukaryotes with chloroplasts seem to have picked up them by overwhelming a solitary celled archaeplastidan with its own particular bacterially-inferred chloroplasts. Since these occasions include endosymbiosis of cells that have their own endosymbionts, the procedure is called auxiliary endosymbiosis. The chloroplasts of such eukaryotes are normally encompassed by more than two layers, mirroring a background marked by numerous engulfment.