--%>
Assignment Help - homework help

llustration of freshwater flat-worm

What is an illustration of freshwater flat-worm? Due to that habitat illustrate the physiological problem that such animals must resolve?

E

Expert

Verified

Platyhelminthes of freshwater such as planarias contain an internal environment very concentrated in solutes than the exterior and therefore they present a tendency to gain water. Such organisms then require a drainage system to evade cell death caused by extreme water.

The problem is resolved by the presence of protonephridia situated all along longitudinal channels in the animal body. Protonephridia contain ciliated cells, the flame cells, which push water external the body via excretory pores.

   Related Questions in Biology

  • Q : Definition of Pka What is the

    What is the definition of Pka?

    		•
  • Q : How symmetry and nervous system

    How symmetry and nervous system typified in echinoderms?

    		•
  • Q : Explanation of Gantt chart In

    Question One Refer back to your answers in Assignment #3 and Assignment #6. Select four of the challenges listed in the assignment instructions.  For each of the challenges selected identify specific and detailed recommendations related to each challenge to assist an

    		•
  • Q : Motor activity of left side of body or

    How is it structurally described that motor activity of left side of body is controlled by the right cerebral hemisphere and motor activity of right side of the body is controlled by left cerebral hemisphere?

    		•
  • Q : What do you mean by hemoglobin What do

    What do you mean by hemoglobin? Name the inorganic element which is basic in the composition of hemoglobin?

    		•
  • Q : Development of pluricellular organisms

    How does mitosis contribute in the development of pluricellular organisms?

    		•
  • Q : Project Control-Stages of Projects

    Project Control-Stages of Projects: Ensuring the  project proceeds to plan: Monitoring costs Monitoring time achievements Monitoring resource usage and people performance Assessing likely project outco

    		•
  • Q : Sickle cell anemia-hereditary

    In the sickle cell anemia, hereditary disease, there is swap of one amino acid through another in one of the four polypeptide chains of hemoglobin. In this situation are all of the structural levels of protein modified?

    		•
  • Q : State American Disabilities Act or ADA

    American Disabilities Act (ADA): The legislation passed in the year 1990 which prohibits discrimination against people with disabilities. Below this Act, discrimination against a disabled person is unlawful in transportation, employment, public accomm

    		•
  • Q : Beadth of application - Taxonomy of

    This research is widened from pure research to action research. Pure research is concerned with the advancement of knowledge. It tries to understand some phenomena and cause-effect relationship theories. It does not bother whether the findings are used in practice or

    		•