Amarine biologist catches a species of fish she has never seen before. upon examination, she determines that the species has a predominantly cartilaginous skeleton and a swim bladder. if its pectoral fins are not fused with its head, to which category of fish does the specimen belong?
rays
osteichthyes
sharks
hagfish

How do water’s relative densities as a solid and a liquid differ from that of most other substances? water’s solid and liquid forms have different densities, while most other substances have solid and liquid forms with similar densities. water’s solid and liquid forms have similar densities, while most other substances have solid and liquid forms with different densities. water’s liquid form is less dense than its solid form, while the opposite is true of most other substances. water’s solid form is less dense than its liquid form, while the opposite is true of most other substances.