--%>
Assignment Help - homework help

Do all mammals contain a placenta

Do all mammals contain a placenta?

E

Expert

Verified

Mammals of the monotreme group (that is, platypus and echidnas) are oviparous, egg-laying, and they do not encompass a placenta. Mammals of the marsupial group (that is, kangaroos, koalas and opossums) do not contain a placenta either; females of this group give birth to embryonic young that then carry on growth in the mother’s pouch. Placenta just forms in female placental mammals.

   Related Questions in Biology

  • Q : Desertion of the ammoniotelic excretion

    Why subsequent to the passage of animals from aquatic to the terrestrial habitat does the desertion of the ammoniotelic excretion take place?

    		•
  • Q : Origin of sexual reproduction-Brad

    Illustrate the quote Origin of sexual reproduction propose by Brad Harrub and Bert Thompson?

    		•
  • Q : Define Web marketing research Web

    Web marketing research: This is about conducting research (generally statistical analyses) to understand web marketing issues. The procedure of a research project comprise: discovering a market issue, translate it in a marketing research project, desi

    		•
  • Q : What is Homologues identification

    Homologues identification: This is the first step in homology the homologues will be unknown. We have many protein databases such as PROSITE, where we modeling. We have to get the homologues to the sequence we have. There will be several number of hom

    		•
  • Q : Substance from which chromatin is made

    Name the substance from which chromatin is made? Answer: Chromatin is made up of DNA molecules related to proteins termed as histones.

    		•
  • Q : Periods in which interphase are

    Write down the three periods in which interphase are separated.

    		•
  • Q : Describe BID Administration BID

    BID ADMINISTRATION: Generally a RFP is prepared by a set of team than a single person of single team. BID office is created for similar purpose. Collectively working in a particular RFP or BID refers to BID administration. Generally a BID owner is ide

    		•
  • Q : What is Optimization Optimization :

    Optimization: Finding an option with the most cost efficient or highest attainable performance beneath the given constraints, by maximizing preferred factors and diminishing undesired ones. In comparison, maximization means trying to achieve the highe

    		•
  • Q : Define Career Pathing Career Pathing :

    Career Pathing: It is the process employed by an employee to chart a course in an organization for his or her career path and career growth. Career pathing includes understanding what skills, knowledge, personal characteristics, and experience are nee

    		•
  • Q : Explain tumor antigens Explain tumor

    Explain tumor antigens in short?

    		•