Answer:
maternal mtDNA
Explanation:
While nothing but the haploid nucleus remains of the sperm during fertilisation, the ovum still has its mitochondria and other organelles. Mitochondria are capable of division and will divide according to cell's needs.
So it is the maternal mtDNa that gets passed on. Spontaneous mutations can happen at any point ofcourse and get passed on in the same way.
Sea stars are members of class Asteroidea and are the most well known members of Echinoderms.
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What are the characteristics of Sea stars?</h3>
- The sea stars, or members of the class Asteroidea, are among the most well-known echinoderms.
- There are more than 1,800 species of them, and they come in a wide range of sizes, colors, and shapes.
- Five thick arms that stretch from a central disk where organs penetrate the arms are one of the features of sea stars that distinguish them from other echinoderm classes.
- Sea stars utilize their tube feet to hold prey as well as to grip surfaces. They can evert one of their two stomachs, which they have, through their mouths to exude digestive juices into or onto prey before absorption.
- Sea stars have two stomachs. By effectively liquefying the prey, this procedure helps facilitate digestion.
<h3>What are the functions of echinoderms highlighted in Sea stars? </h3>
- Like other echinoderms, Sea stars are radially symmetrical with pentamerous radial symmetry, coelomate, triploblastic and have organ-system level of organization.
- Pedicellariae are present.
- Calcareous endoskeleton made of ossicles is present that gives them a spiny appearance.
- Water Vascular System is present which is the most distinctive features of echinoderms.
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Embryonic stem cells AR more volatile and they have a less shelf life adult stem cells have a longer shelf life or less volatile and less likely to be rejected by the patient's body all the same because stem cells are blank pages that can be used for anything any disease sickness