Whether or not an animal contains a spine or backbone distinguishes animalia into two different groups: Vertebrates (with spines--examples: canines, felines, humans) and invertebrates (without spines--examples: sponges, worms, mollusks).
they are all animals.
Having hair is a characteristic of all "mammals."
Invertebrate animals with spikes and spines all over their bodies.
no giant squids never travel in groups
Vertebrates and invertebrates.
Virtually all animals are heterotrophs (i.e. animals that eat things for nourishment).
One characteristic of a poultry animal is that it is a bird. Typically, birds have wings. For example, chickens, ducks, and roosters are all considered poultry animals!
Protists have nucleus and double membranous organells.Bacteria do not have them.
Animals are placed into different groups to make classifing them easier. Answer found in 6th grade science textbook. Good Luck!
The amino group NH2 and the carboxylic group COOH are characteristic in all amino acids.
It is rephrased as mammals are homeothermic animals .
If we didn't study animals how would vets know how to cure animals when their ill or wounded and also to know all about the animal like his cells,nucleolus, and mitrochondria which are all parts of a cell