_____ are the simplest of all invertebrates.
sponges
anemones
segmented worms
round worms
flat worms
2 answers
sponges
Vertebrate
A)a section or part of an animal's body
B)a long appendage around the head of an animal used for holding or moving
C)an animal having a backbone
D)the individual bones in the backbone
E)not moving from place to place; attached in a permanent location
A)a section or part of an animal's body
B)a long appendage around the head of an animal used for holding or moving
C)an animal having a backbone
D)the individual bones in the backbone
E)not moving from place to place; attached in a permanent location
2 answers