Final answer:
Diplurans are wingless and often eyeless arthropods with prominent cerci. They are not as species rich as Collembola and can be less than 2 mm in size, with adaptations for a subterranean lifestyle. The correct option is A.
Step-by-step explanation:
Diplurans are a lesser-known group of arthropods that belong to the class Diplura. While they are not as species-rich as Collembola (springtails), they do exhibit some notable characteristics. Diplurans are indeed wingless and typically have prominent cerci on the last abdominal section, which can resemble pincers or forceps and are often used for sensation or defense.
Size-wise, Diplurans vary greatly, with some species being less than 2 mm in size, whereas others may grow larger. Regarding their vision, many species are indeed eyeless, or have very simplistic eyes, reflecting their adaptation to life in soil or leaf litter where vision is less important than other senses.
Diplurans are also distinct in their morphology, having elongated bodies and a lack of wings, adapting them to a life of burrowing and crawling through narrow spaces in their subterranean environments. The correct option is A.