Question

phylum mollusca
class cephalopoda
what features are shared by all organisms in
class cephalopoda?
tentacles, fast and agile predators, and complex eyes
a single, spiraled shell and eyes at the ends of tentacles
a hinged shell, a sedentary lifestyle, and filter feeding

Explanation:

Cephalopods (like nautilus, cuttlefish, octopus, squid) all have tentacles for capturing prey. They are active predators, fast/agile in water, and have complex eyes (similar to vertebrate eyes for good vision). The second option is wrong as octopus/squid lack a spiraled shell. The third is wrong as cephalopods aren’t sedentary filter - feeders (they’re active predators) and lack hinged shells (except nautilus has a shell, but others don’t have hinged shells like bivalves).

Answer:

A. tentacles, fast and agile predators, and complex eyes