Final answer:
The presence of chloroplasts does not uniquely support the close relationship between charophytes and land plants, as chloroplasts are also found in chlorophytes and other green algae.
Step-by-step explanation:
The question pertains to the evidence which suggests that charophytes are the closest algal relatives of land plants. Among the given options, B) the presence of chloroplasts is not exclusive evidence of the close relationship between charophytes and land plants, as chloroplasts are also found in other algae, such as chlorophytes and not just in charophytes.
Charophytes are the closest living relatives to land plants, sharing characteristics such as a mechanism of cell division with phragmoplasts and similar cellulose-synthesizing proteins, flagellated sperm similar to those found in plants, and a similar structure of their chloroplasts that contain chlorophyll a and b. However, the mere presence of chloroplasts is a feature common to all groups of green algae and, thus, does not singularly support the specific close relationship between charophytes and land plants.