Which structure is unique to vertebrates? (1 point)
Responses
brain
skin
backbone
limbs
backbone
ertebrate embryos(1 point)
Responses
go through the same developmental stages at different rates.
go through the same developmental stages at different rates.
go through the same developmental stages at the same rate.
go through the same developmental stages at the same rate.
develop different structures at the same rate.
develop different structures at the same rate.
develop the same structures at different rates.