Yes, all animals have spines except invertebrates. Amphibians are not invertibrates, so therefore they have a spine and skeletal system.
All fish have spines. They are all vertebrates.
Yes. All mammals have spines.
All reptiles have spines.
Yes. All mammals have spines.
No. Hummingbirds have spines. All birds do.
all snakes have bones because of their backbones
Yes. Possums are mammals, and all mammals have spines.
No, not all cactuses have spines. Some cactus plants have many more than others. Some have longer or shorter, finer or thicker spines. Some have white spines, some colored. And some don't have any spines at all.
No, not all cacti have spines. Some species of cacti have smooth surfaces or small bumps instead of spines. Spines are a common feature in many cactus species, but not a universal one.
No. Invertebrates are animals with no spines (backbones) and whales do have spines. Whales are mammals, and all mammals have spines.
All cactus have spines.
Yes, they all have spines.