Plants are members of the eukaryotic supergroup , and their closest relatives are plants are members of the eukaryotic supergroup , and their closest relatives are archaeplastida; chlorophyte green algae. archaeplastida; charophyte green algae. unikonta; charophyte green algae. unikonta; chlorophyte green algae.

Archaeplastida; chlorophyte green algae.

Explanation:

Archaeplastida are belongs to major group of autotrophic eukaryotes, which contains the green algae, red algae and land plants.

Cell which is present on the Archaeplastida typically lack centrioles, and they have mitochondria with flat cristae. They contain a cell wall including cellulose, and in the form of starch food is stored. Archaeplastida form a monophyletic group main evidence comes from genetic studies which is showing their plastids had a single origin.

Archaeplastidans divided into two main evolutionary lines:

1) The red algae: They are pigmented with phycobiliproteins and chlorophyll a which accumulate starch outside the chloroplast.

2) The green algae and land plants: They are pigmented with chlorophyll b and a but lack phycobiliproteins and starch is accumulated inside the chloroplast.

dna is made up of six smaller molecules -- a five carbon sugar called deoxyribose, a phosphate molecule and four different nitrogenous bases (adenine, thymine, cytosine and guanine).