(tr) to address or present a petition to (a person in authority, government, etc): to petition Parliament. 6. (foll by: for) to seek by petition: to petition for a change in the law.
An invertebrate is an animal without a backbone. (An animal with a backbone is called a vertebrate.) Invertebrates live in every part of the world. In fact, most of the animals on Earth are invertebrates.Invertebrates come in all different shapes and sizes.Some can be seen only through a microscope.ponges, flatworms, jellyfish, sea. Encyclopaedia EncyclopÃ¦dia, Britannica. Inc an invertebrate is an animal without a. (Backbone an animal with a backbone is called a.) Vertebrate invertebrates live in every part of the. world
vertebrate-having a backbone or spinal column; fishes and amphibians and reptiles and birds and mammals are verbetrate animals. zoological science, zoology-the branch of biology that studies animals. invertebrate, spineless-lacking a backbone or spinal column; worms are an example of invertebrate animals.ertebrate. n. 1. (Zoology) any chordate animal of the subphylum Vertebrata, characterized by a bony or cartilaginous skeleton and a well-developed brain: the group contains fishes, amphibians, reptiles, birds, and mammals. adj. 2. (Zoology) of, relating to, or belonging to the subphylum Vertebrata.