What is a primitive animal?

Primitive animals are ones that have not changed dramatically over the millennia and remain very similar to their ancestors.

1. What's the most primitive animal?
2. What are primitive organisms examples?
3. What are called primitive?
4. What makes a species primitive?
5. Are animals with porous body?
6. Is Sponge an animal?
7. What does the primitive man mean?
8. What is a primitive state?
9. What are primitive mammals?
10. What is the most primitive rodent?
11. What are the two most primitive living mammals?
12. What does primitive life mean?
13. Which animals have no legs?
14. What is an animal with a segmented body?
15. What animals have a tube within a tube body plan?

What's the most primitive animal?

Cnidarians are the most primitive "true" multicellular animals (Subkingdom Eumetazoa). They are radially symmetric, and can be either sessile or motile, and sometimes both (at different stages in their life cycles). They are mostly marine, though hydrozoans are abundant in freshwater.

What are primitive organisms examples?

Primitive organisms are the lower organisms that were the first to be formed on earth. These organisms have a simple body structure. The simplest example of primitive organisms is Prokaryotes. In Prokaryotes all the necessary functions are carried out by a single cell.

What are called primitive?

An organism which has a simple body structure and ancient body design or features that have not changed much over a period of time is called primitive.

What makes a species primitive?

In phylogenetics, a primitive (or ancestral) character, trait, or feature of a lineage or taxon is one that is inherited from the common ancestor of a clade (or clade group) and has undergone little change since. ... Evolutionary relatedness between living species can be connected by descent from common ancestry.

Are animals with porous body?

Sponges are animals of the phylum Porifera (Modern Latin for bearing pores). They are multicellular organisms that have bodies full of pores and channels allowing water to circulate through them, consisting of jelly-like mesohyl sandwiched between two thin layers of cells.

Is Sponge an animal?

sponge, any of the primitive multicellular aquatic animals that constitute the phylum Porifera. They number approximately 5,000 described species and inhabit all seas, where they occur attached to surfaces from the intertidal zone to depths of 8,500 metres (29,000 feet) or more.

What does the primitive man mean?

Definitions of primitive person. a person who belongs to an early stage of civilization. synonyms: primitive.

What is a primitive state?

adj. 1 of or belonging to the first or beginning; original. 2 characteristic of an early state, esp. in being crude or uncivilized.

What are primitive mammals?

Primitive mammal can refer to: monotremes. marsupials. sloths. armadillos.

What is the most primitive rodent?

Mountain beavers are the only extant member of the family Aplodontidae, and are considered the most primitive living rodents.

What are the two most primitive living mammals?

Monotremata is the first or most primitive order of living mammals. They are found in the Australian area. The two major species are: Ornithorhynchus anatinus,the duck-billed platypus, and Tachyglossus aculeatus, the echidna or spiny anteater.

What does primitive life mean?

being the first or earliest of the kind or in existence, especially in an early age of the world: primitive forms of life. early in the history of the world or of humankind. characteristic of early ages or of an early state of human development: primitive toolmaking.

Which animals have no legs?

Snakes are reptiles with no legs. They move by using their muscles to push their scales against the ground or other objects. hibernation.

What is an animal with a segmented body?

Annelids. Annelids contain largely segmented bodies with each segment containing elements of the different body systems essential for life, such as the nervous system. Earthworms, ringed worms and leeches all fall into the annelida category.

What animals have a tube within a tube body plan?

The tube within a tube is the annelid body plan. This means that in the coelomic cavity there is a superficial blanket of muscle, epidermis, and cuticle and an internal blanket of the digestive system. Hence, the correct answer is option D- Annelida.