The animals having backbones are called _____.
vertebrates
strong
invertebrates
complex
simple
3 answers
vertebrates
Gills
A)a fin that is a fish's tail
B)made of cartilage, which is a strong, elastic connective tissue
C)rounded, like something swollen
D)a deep sea fish with a skeleton of cartilage
E)organs for breathing underwater, consisting of membranes through which oxygen can pass
A)a fin that is a fish's tail
B)made of cartilage, which is a strong, elastic connective tissue
C)rounded, like something swollen
D)a deep sea fish with a skeleton of cartilage
E)organs for breathing underwater, consisting of membranes through which oxygen can pass
E) organs for breathing underwater, consisting of membranes through which oxygen can pass.