--%>

Characteristics of protozoans

What are the various characteristics of protozoans which make them look like animals?

E

Expert

Verified

Protozoans are unicellular beings with certain identical characteristics to animal cells.

In comparison to pluricellular organisms protozoans are much proximal to the animal kingdom than to plants: they are heterotrophs, they contain a rudimentary locomotion system (that is, amoeboid movements, flagella and cilia), they do not contain cell wall, certain species present structures which resemble structures of a primitive digestive system, with cytostome (or mouth) and cytopyge (or anus), specialized in excretion and digestion.

The evolutionary hypothesis which animal cells encompass come from the differentiation of protozoans is strong.

   Related Questions in Biology

  • Q : Plasma membrane of the cell Name the

    Name the plasma membrane of the cell? Write down its main functions?

  • Q : Explanation of chiasms of homologous

    Give a brief explanation of the term “chiasms” of homologous chromosomes?

  • Q : Question on sales tax-subsidy policy

    Considering that all firms have identical constant long-run average costs before the sales tax-subsidy policy, what do you assume to happen to the price of product, the output of every firms, and industry output, in the short run & the long run? (Hint: How

  • Q : Utilizing Diversity - Organizational

    Firms are realizing that utilizing diversity an all aspects of the workforce makes not only a strong moral sense but also business sense. By ensuring that diversity is built into various groups of members, such as project teams, business start-up teams, customer response teams, sales force and to

  • Q : Why is it not correct to affirm that

    Why is it not correct to affirm that DNA self-reproduces?

  • Q : Characterized Reptiles according basic

    Characterized Reptiles according to the basic morphology, examples of representing beings, circulation, skin, respiration, nitrogen waste, thermal control and types of reproduction?

  • Q : First stage of embryonic development

    Explain the cell division during first stage of embryonic development called? How is this stage classified?

  • Q : In which subphyla are the

    In which subphyla are the protochordates separated? Write down some representatives of each protochordate subphylum?

  • Q : Define the term immunogen Briefly

    Briefly define the term immunogen? Also illustrate the types of immunoglobulin?

  • Q : Enzymes (a)Describe the lock and key

    (a)Describe the lock and key mechanism of enzymes action. (B)Which properties of enzymes are represented by the lock and key mechanism?