(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
(wÃ»rm) 1  Any of various invertebrate animals having a soft, long body that is round or flattened and usually lacks limbs. The term worm is used variously to refer to the segmented worms (or annelids, such as the earthworm), roundworms (or nematodes), flatworms (or platyhelminths), and various other groups.