Select whether the description is for Vertebrates or Invertebrates. insects, spiders, snails, and worms

most types of pets

more of them on Earth than the other group

have simpler body systems

have more-complex body systems

fish, birds, reptiles, amphibians, and mammals

1) invertebrate
2) vertebrae
3) vertebrae
4) invertebrate
5) vertebrae
6) vertebrae

The difference between Invertebrates is that they have no spine and vertebrates are those who have a spine.

For the first one, it is invertebrates
For the second one, it’s vertebrates
For the third one, I think it’s vertebrates
For the fourth one, invertebrates
For the fifth one, vertebrates
For the sixith one, it is vertebrates

Hope this helps!! Sorry if there are some typos