deuterostomes
Yes, protostomes exhibit spiral cleavage, where the cells are arranged in a spiral pattern. Deuterostomes exhibit radial cleavage, where the cells are arranged in a radial pattern. This difference occurs during early embryonic development and influences the overall body plan formation.
Both protostomes and deuterostomes develop a blastopore during early embryonic development, which is the initial opening that forms in the embryo. In protostomes, the blastopore typically becomes the mouth, while in deuterostomes, it generally develops into the anus. This fundamental difference in fate reflects their divergent evolutionary pathways and influences their subsequent developmental processes. Additionally, protostomes undergo spiral cleavage, whereas deuterostomes exhibit radial cleavage, further distinguishing their embryonic development.
Spiral holoblastic cleavage is characteristic of several animal groups, including annelid worms, some flatworms, and most mollusc's. It differs from radial cleavage in numerous ways. First, the cleavage planes are not parallel or perpendicular to the animal-vegetal axis of the egg; rather, cleavage is at oblique angles, forming a "spiral" arrangement of daughter blastomeres. Second, the cells touch one another at more places than do those of radially cleaving embryos. In fact, they assume the most thermodynamically stable packing orientation, much like that of adjacent soap bubbles. Third, spirally cleaving embryos usually undergo fewer divisions before they begin gastrulation, making it possible to follow the fate of each cell of the blastula. When the fates of the individual blastomeres from annelid, flatworm, and mollusc embryos were compared, many of the same cells were seen in the same places, and their general fates were identical Blastulae produced by radial cleavage have no blastocoel and are called stereoblastulae._______________________________________________________________________P.S. I DID NOT WRITE THIS I GOT IT FROM WWW.GOOGLE.COM
yes, the milky way it is a barred spiral galaxy
About two thirds of all spiral galaxies are barred. The Milky Way is classified as a barred spiral galaxy.
Coelomates are either deutermostomes or protostomes. A protostomes have spiral cleavage lie mollusks, annelids, and arthropods. A deutermostomes has radial cleavage such as echinoderms, and chordates.
Protostomes Deuterostomes 1.Mouth develops first then anus 1. Anus develops first then mouth 2.Blastopore develops into mouth 2.Blastopore develops into anus 3.Coelom absent and a schizocoel 3. Coelom develops as enterocoel by fusion develops by a split of mesoderm of gut pouches. 4.Cleavage is spiral and determinate 4. Cleavage is radial and indeterminate. 5.Larva is trochophore. 5. Larva is bipinnaria or tornaria 6.E.g. Molluscs, annelida & 6.E.g. Echinodermata & Chordata arthropodes
Protostome: any member of the lower invertebrate phyla in which the mouth appears before the anus during development, cleavage is spiral and determinate, and the coelom forms as a splitting of the mesoderm.
Yes, protostomes exhibit spiral cleavage, where the cells are arranged in a spiral pattern. Deuterostomes exhibit radial cleavage, where the cells are arranged in a radial pattern. This difference occurs during early embryonic development and influences the overall body plan formation.
This is straight from dictionary.com, so no credit for me: "any member of the lower invertebrate phyla in which the mouth appears before the anus during development, cleavage is spiral and determinate, and the coelom forms as a splitting of the mesoderm." That help? :)
Cleavage of the frog egg is classified as radial cleavage, which is characterized by symmetrical, evenly spaced divisions that occur in a radial pattern around the pole of the egg. However, it is worth noting that frog eggs exhibit a specific type of radial cleavage known as mesolecithal cleavage due to their moderate amount of yolk. This results in a cleavage pattern that is somewhat different from the strictly radial cleavage seen in other organisms, leading to a more complex arrangement of blastomeres.
Both protostomes and deuterostomes develop a blastopore during early embryonic development, which is the initial opening that forms in the embryo. In protostomes, the blastopore typically becomes the mouth, while in deuterostomes, it generally develops into the anus. This fundamental difference in fate reflects their divergent evolutionary pathways and influences their subsequent developmental processes. Additionally, protostomes undergo spiral cleavage, whereas deuterostomes exhibit radial cleavage, further distinguishing their embryonic development.
Probably not, though I have never heard of a spiral suitcase before.
After the coelom developed in early animals, a process called spiral cleavage and determinate cleavage allowed for the evolution of many types of protostomes. This process resulted in differences in developmental processes, leading to various body plans and morphological diversity among protostomes.
Deuterostomes and protostomes are two major groups of animals with different developmental processes. In deuterostomes, the blastopore becomes the anus, while in protostomes, it becomes the mouth. Deuterostomes also exhibit radial cleavage and indeterminate cleavage, meaning each cell has the potential to develop into a complete organism. Protostomes, on the other hand, show spiral cleavage and determinate cleavage, where the fate of each cell is determined early on. These differences in developmental processes have significant implications for the formation and organization of body structures in these two groups of animals.
Spiral holoblastic cleavage is characteristic of several animal groups, including annelid worms, some flatworms, and most mollusc's. It differs from radial cleavage in numerous ways. First, the cleavage planes are not parallel or perpendicular to the animal-vegetal axis of the egg; rather, cleavage is at oblique angles, forming a "spiral" arrangement of daughter blastomeres. Second, the cells touch one another at more places than do those of radially cleaving embryos. In fact, they assume the most thermodynamically stable packing orientation, much like that of adjacent soap bubbles. Third, spirally cleaving embryos usually undergo fewer divisions before they begin gastrulation, making it possible to follow the fate of each cell of the blastula. When the fates of the individual blastomeres from annelid, flatworm, and mollusc embryos were compared, many of the same cells were seen in the same places, and their general fates were identical Blastulae produced by radial cleavage have no blastocoel and are called stereoblastulae._______________________________________________________________________P.S. I DID NOT WRITE THIS I GOT IT FROM WWW.GOOGLE.COM
First of all, it's a spiral galaxy, not an spiral galaxy. Second, a spiral galaxy would have a spiral shape, obviously.