Which are characteristics of cephalopods? check all that apply.

a)open circulatory system

b)complex nervous system

c)swim by jet propulsion

d)two shells connected by a hinge

e)feet modified as tentacles

The correct answer is option B, C, AND E.

Explanation:

Cephalopods are the member of class Cephalopoda of the molluscan group such as squid. They're made up of a body, a head and a foot having a muscular case called a mantle that protects their organs.  

Some species also have tentacles that are modified of their feet.

Cephalopods nervous system is the most complex of any invertebrate nervous system.

Member of this class shows different types of swimming to fishes which is jet propulsion such as squid.

Thus, the correct answer is option B, C, AND E.

lunar landing mission. apollo 11 was the first manned mission to land on the moon. the first steps by humans on another planetary body were taken by neil armstrong and buzz aldrin on july 20, 1969. the astronauts also returned to earth the first samples from another planetary body.

explanation: