Question

Trilobite is an extinct

• A. Mammal
• B. Reptile
• C. Mollusc
• D. Arthropod

Answer 1

The correct option is D Arthropod

Trilobites are extinct arthropods, which were characterised by the presence of three-lobed bodies and undifferentiated appendages. They were a common inhabitant of a shallow sea of the palaeozoic era, specifically during cambrian (520-505 million yrs ago) and ordovician periods (505-430 million years ago) and become distinct during great permian. They are classified as arthropods owing to segmented body plan and presence of appendages. Mammals and reptiles are amniotic vertebrates that produce amniotic eggs to provide nutrition and prevent its desiccation. They do not have jointed appendages and segmented body plant.

So, the correct answer is option D.