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Probably invertebrates and vertebrates (although "chordates" is better for vertebrates) since the two groups are technically distinguished by the presence of a ventral cord in the invertebrates and a dorsal nerve cord (in their back). All but a few minor groups of chordates have their dorsal nerve cord protected by vertebrae so commonly, most people say invertebrates and vertebrates (until high school and college).
What else can I help you with?
What are the major groups into which scientists classify animals?
animals are put into groups because they have different features for example snakes are scally,horses are furry and so on and so fourth like if you dint have groups you would mistake worms for a snakes because they have the same features but there in different groups.
The two major groups of animals are?
Vertebrates and Invertebrates
What are two major decomposes groups?
Plants and animals
Biologist classify animals into major groups called?
phyla?
What are the 2 major groups of animals?
it is 4
What are the two major groups of a warmblooded animals?
Mammals & birds.
Two major groups of animals?
Types of birds Types of primates
How many families of animals are there in the world?
There are around 35 major groups, or "orders," of animals in the world, which can be further divided into smaller groups like families and species.
What are the 3 major groups of reptiles?
Snakes, turtles, crocodiles, and extinct animals such as dinosaurs.
Biologists classify animals in the animal kingdom into about 35 major groups called?
Phylum
What were the three major groups of animals?
The answer to this question is, the three major groups of animals are the worms,fish,and corals they are the main type of animal except for the coral. the coral is something that is presented in the ocean that some fish live and hide inside and they are the main type of fish habitat in the ocean.
How does the number of heart chambers differ in the various major groups of vertebrate animals?
some only have three chambers
