What are Basal Vertebrates?

Vertebrate refers to animals with vertebrae, and is a subphylum of chordae. The largest number, the most complex structure, and the highest evolutionary status, evolved from mollusks. The morphological structures are very different from each other, and the lifestyles are very different. Vertebrate vertebrates are generally symmetrical in shape. The whole body is divided into three parts: the head, the trunk, and the tail. There are relatively perfect sensory organs, motor organs, and a highly differentiated nervous system. Including round mouth, fish, amphibians, reptiles, birds and mammals, six categories.

The origin of higher-order metabiological categories has always been the core proposition of evolutionary life sciences. The origin of the total roots of vertebrate lineages, including humans, is related to the evolutionary relationship between the two groups of vertebrates.

Vertebrate and human life are closely related.

Lee: They provide humans with food such as meat, eggs, milk, leather goods such as leather goods and shoes, and clothing products such as woolen sweaters and down jackets. In addition, many vertebrates can hunt agricultural and forest pests,

The French National Scientific Research Center issued a communiqué on February 18, 2010, saying that a research team composed of US and French researchers had recently discovered substances affecting the symmetry of vertebrate bodies.

The bulletin said that the research team found that the symmetry of the vertebrate body had been shown as early as the embryonic development, that is, the period of somite formation. Vitamin A acid played a key role in ensuring body symmetry. Somite is a certain number of temporary structures formed by vertebrates along the anterior and posterior axis of the body during embryonic development. It gradually differentiates into tissues such as bones and muscles.

Researchers use experimental mice as research objects. They found that when lab rats lacked vitamin A acid, it developed abnormalities in the development of symmetrical bodies. In addition, a protein called Rere is involved in the activation of the vitamin A acid signal. If the Rere protein in the experimental mouse is mutated, it will lag in the formation of body symmetry.

The research results have been published in the latest issue of the British "Nature" magazine. The researchers said that abnormal development of body symmetry can lead to diseases such as scoliosis, and the discovery provides new ideas for understanding the formation of vertebrate body symmetry and preventing abnormal development of the body. ^[1]