--%>
Assignment Help - homework help

Morphological features of echinoderms

Write down basic morphological features of echinoderms?

E

Expert

Verified

Echinoderms, as the name points to (derma = skin, echino = spiny), are creatures with the spines originated from the endoskeleton. Their endoskeleton is made of calcareous plaques that besides spines contain pedicellaria, small pincers used to clean the body and to help the capturing of prey. They also present a hydrovascular system known as the ambulacral system. Adult echinoderms have pentaradial symmetry; the radial symmetry in these animals is secondary, present only in adults.

   Related Questions in Biology

  • Q : Five Stage Model-Group Development -

    This group development model given by Tuckman and Jensen characterizes groups as proceeding through five distinct stages: forming, storming, norming, performing, and adjourning. 1)     Forming: this first stage is characterized by a great deal of uncer

    		•
  • Q : What are Labor Relations Labor

    Labor Relations: These relations are a broad field containing all the myriad interchanges among employers and employees. While the word is most frequently used to discuss this exchange as it relates to unionized employees, it might also refer to non-u

    		•
  • Q : How is gas exchange done in mammals How

    How is gas exchange done in the mammals?

    		•
  • Q : Explain zone of equivalence Explain the

    Explain the meaning of zone of equivalence?

    		•
  • Q : Where in plants is large amount of the

    Where in plants is large amount of the IAA found?

    		•
  • Q : Events which mark the beginning and end

    Write down name of the events which mark the beginning and end of first interphase period. What takes place in the cell in this time?

    		•
  • Q : Concept of Value Creation Concept of

    Concept of Value Creation: Value creation has been main objective of the business entity. Creating the value for consumers helps in selling the products as well as services, whereas creating the value for stake holders, in form enhances the stock pric

    		•
  • Q : Define Sales Cycle Management Sales

    Sales Cycle Management: The sales cycle is the order of phases that a classical customer goes through while deciding to buy something. Like a rule, the sales cycle is illustrated from the customer's perspective. The initial phase of the sales cycle ma

    		•
  • Q : Main manifestations of leishmaniasis

    Write down the main manifestations of the leishmaniasis?

    		•
  • Q : Schedules and Constraints Schedules and

    Schedules and Constraints:A) It is easily said (though often ignored) that schedules must be developed within the constraints that impinge upon the project manager and the organization. B) Constraining (and e

    		•