162k views
17 votes
Which characteristic is shared by all mollusks and echinoderms?

O live only in salt water
O lack a backbone
O use tube feet to move
O have an open circulatory system

Only have 1 hour left

User Rufat
by
3.9k points

2 Answers

10 votes

Answer:

D

Step-by-step explanation:

i'm not 100% sure if this is correct

User JackWu
by
4.1k points
7 votes
They share lack of back bone, use tube feet to move, and I’m not sure about the open circulatory system because mollusks that fall into cephalopod category have closed ones but all others have open as well as echinoderms
User Tyren
by
4.0k points