agnatha मीनिंग इन हिंदी

उदाहरण वाक्य

1. They have been tentatively assigned to Agnatha by Janvier.
2. This includes bony fish ( Osteichthyes ), cartilaginous fish ( Chondrichthyes ), and jawless fish ( Agnatha ).
3. In all vertebrates except Agnatha, B cells and T cells are produced by stem cells in the bone marrow.
4. The silver lamprey is a member of the Class Agnatha, sometimes referred to as cyclostomes ( round-mouths ).
5. Recent molecular and morphological phylogenetic studies place lampreys and hagfish in the superclass Agnatha or Agnathostomata ( both meaning without jaws ).
6. The original scheme groups hagfish and lampreys together as cyclostomes ( or historically, Agnatha ), as the oldest surviving class of vertebrates alongside gnathostomes ( the now-ubiquitous jawed vertebrates ).
7. The vertebrate jaw probably originally evolved in the Silurian period and appeared in the Gnathostomes ), which have seven arches, and primitive jawless vertebrates ( the Agnatha ), which have nine.
8. The two genes are believed to result from a gene duplication event; the ancestral gene is estimated to be about 500 million years old and is found in cyclostomata ( modern members of the Agnatha ).
9. While there is no fossil evidence directly to support this theory, it makes sense in light of the numbers of pharyngeal arches that are visible in extant jawed ( the Gnathostomes ), which have seven arches, and primitive jawless vertebrates ( the Agnatha ), which have nine.