Agnatha is a superclass of fish that are characterised by their lack of a jaw as opposed to the presence of a jaw found in most modern fish. The surviving two classes are hagfish and lampreys.
Archaebacteria
20,000 b.c.
torpedo ray is the most shockin fish?
balls
The class of minerals called carbonates contain carbon and oxygen. One of the most common carbonate minerals is calcium carbonate, commonly called calcite.
It is as primitive as a cave man.
I have just been learning about the phylum 'Chordata' in class. Most fish are in the class called 'Fish'. Pretty simple, and i hope you find this useful!
Most of the fish belong to the class called class Chrodata. Examples of this type of fish include tilapia, Nile perch and the cat fish.
Primitive fish are typically simpler in structure and behavior, with characteristics like cartilaginous skeletons and lack of jaws. In contrast, more advanced fish have evolved adaptations like bony skeletons, jaws, and specialized sensory organs for improved survival and reproduction. They also exhibit more complex behaviors and reproductive strategies compared to primitive fish.
Osteichthyes, the bony fish class, has over 30,000 species.
The most primitive bacteria are known as cyanobacteria, also called blue-green algae. They are often considered to be some of the earliest forms of life on Earth and are capable of photosynthesis.
A: jawless fish
All primitive soft-bodied animals that live in the sea. Most fish, most arthropods and quite a few insects.
Most fish have only two heart chambers.Amphibians and some types of primitive fish have four heart chambers, and the fourth one of these is known as the conus arteriosus.
The most primitive fish are typically represented by the jawless fish known as agnathans, which include species like lampreys and hagfish. These fish have a simple body structure and lack jaws, fins, and paired appendages, differentiating them from more advanced fish. They are considered some of the earliest vertebrates, having existed for hundreds of millions of years, providing insights into the evolution of more complex fish and vertebrates. Their unique characteristics make them a significant focus in studies of vertebrate evolution.
fish is a type of animal. Same with birds.
most primitive