--%>

Same extraembryonic membranes in all vertebrates

Whether extra-embryonic membranes are same in all the vertebrates?

E

Expert

Verified

The presence of each extra-embryonic membrane varies as per the vertebrate class. In fishes and amphibians only yolk sac is present. In birds and reptiles, besides the yolk sac there are the chorion, the amnion, and the allantois. In placental mammals, besides all these membranes the placenta is present too.

   Related Questions in Biology

  • Q : Three structures shared by every

    Write down the three structures shared by every chordate which typify the group?

  • Q : Is epithelium vascularized Is

    Is epithelium vascularized? How do oxygen and nutrients reach the epithelium? Why is this characteristic an important evolutionary acquisition?

  • Q : Neo Freudian Personality Theory -

    There were several Freud's colleagues who disagreed with his rigid adherence to consider only the basic biological or instinctive as determinants. According to these neo-Freudian's, social relationships played a vital role in the formation and development of personality. For instance, Alf

  • Q : Organization change management

    Organization change management is the very useful path for an individual to achieve the aim and to achieve the goals in the life from the viewpoint of organization and from the criteria of the organization. To manage the change, organizational behavio

  • Q : Main gas exchange organs of plants

    Write down the main gas exchange organs of plants? How is the procedure accomplished?

  • Q : Contraction of sarcomeres of the muscle

    What are various illustrations of movement made by the contraction of sarcomeres of the muscle cells?

  • Q : What is order and rejection reasons

    Order reasons and Rejection reasons: Example Order reason can be utilized for sample products, free goods and best price discounts and at the similar time rejections can utilized mostly for discard the documents and also in the case of CR, DR.

  • Q : Functions of the National family

    Briefly describe the main functions of the National family welfare program?

  • Q : Globalization of Business What is the

    What is the meaning of Globalization of Business and what is the reason many companies are in the process of expanding themselves?

  • Q : Describe Joint Application Development

    Joint Application Development (JAD): It is a process which accelerates the design of information technology explanations. JAD employs customer participation and group dynamics to precisely depict the user's view of the business requirement and to join