NEET BIOLOGY

Detailed explanation-1: -Primary plastids occur in the supergroup Archaeplastida, which is composed of three lineages: glaucophytes, red algae, and green plants including green algae and higher plants. These plastids evolved directly from cyanobacteria (Fig.

Detailed explanation-2: -The supergroup archaeplastida includes the red algae, green algae and land plants. Each of these three groups have multicellular species and the green and red algae have many single-celled species. The land plants are not considered protists. The archaeplastida evolved over 1 billion years ago.

Detailed explanation-3: -Archaeplastida. Red algae and green algae are included in the supergroup Archaeplastida. It was from a common ancestor of these protists that the land plants evolved, since their closest relatives are found in this group.

Detailed explanation-4: -Archaeplastida. The three taxa that comprise Archaeplastida are the Chloroplastida (green algae + land plants), Rhodophyta (red algae), and Glaucophyta.

Detailed explanation-5: -It is well supported that this group of protists share a relatively-recent common ancestors with land plants. The green algae are subdivided into the chlorophytes and the charophytes. The charophytes are the closest-living relatives of land plants, resembling them in morphology and reproductive strategies.