This occurs as a result of the folding of ectoderm tissue. The ectoderm is a type of germ cell layer present in a young embryo.
Morphogenesis refers to the biological process by which an organism develops its shape and form. It involves cell differentiation, growth, and movement to create the overall structure of an organism during its development.
The central nervous system develops in a fetus during the first trimester of pregnancy.
During the development of most vertebrates, the notochord becomes the nucleus pulpous. In some species, such as the sturgeon and hagfish, the notochord remains even after adulthood is reached.
A fetus develops a nervous system during the embryonic stage of development, which occurs around the 3rd to 8th week of pregnancy.
The fact that jawless fish retain the notochord during development suggests that jawed vertebrates have evolved to develop without the notochord. This indicates that the notochord is an ancestral characteristic that has been lost or modified in the evolutionary lineage leading to jawed vertebrates.
Morphogenesis is controlled by various factors including genetic information, signaling molecules, and physical forces. These factors interact to regulate cell behavior and tissue organization during development.
The neural tube is the structure in mammalian embryos that develops into the brain and spinal cord. It forms from the ectoderm layer during development and gives rise to the central nervous system.
Animals in which the anus develops before the mouth belong to a group called deuterostomes. Examples include echinoderms (such as starfish and sea urchins) and chordates (which include vertebrates like humans). During early embryonic development in deuterostomes, the blastopore develops into the anus first, with the mouth forming later.
Any substance that governs the movement and development of cells during morphogenesis by forming a concentration gradient in the developing tissue
a fertilized cell develops into a organism during the cell cycle
Vertebrates do not have exoskeletons. However, they do have internal organs, vertebral columns, and tails. Lampreys are vertebrates that also do not have jaws.
No. The 1st vertebrates appeared in the fossil record about 525 million years ago during the Cambrian Period. This was in the Paleozoic Era.