Question

which organisms are most closely related? cyanea artica (jellyfish) & ctenodiscus crispatus (mud starfish); naja naja (cobra) & glycine max (soya bean); equus caballas (horse) & equus burchellii (zebra); ophiocomina nigra (black brittle star) & brassica nigra (black mustard)

Explanation:

To determine closely related organisms, we look at their scientific names. Organisms with the same genus (first part of the scientific name) are more closely related. Equus caballus (Horse) and Equus burchellii (Zebra) share the genus Equus, while others have different genera or are from different kingdoms (e.g., cobra - animal, soya bean - plant; jellyfish - cnidarian, mud starfish - echinoderm but different genera; black brittle star - echinoderm, black mustard - plant).

Answer:

C. Equus caballus (Horse) & Equus burchellii (Zebra)