--%>
Assignment Help - homework help

Protozoans representing contractile-pulsatile-vacuoles

Are protozoans representing contractile, or pulsatile, vacuoles simply found in fresh or in salt water?

E

Expert

Verified

Fresh water is less concentrated of solutes than sea water and it (that is, fresh water) tends to be less concentrated than the intracellular environment forming cells to swell. Sea water, on the other hand, as it is very concentrated tends to dehydrate the cell.

The vacuoles of protozoans are inner structures specialized in water storage which when essential release water to the cytoplasm. Vacuoles therefore can dilute the cytoplasm for it to enter into the osmotic equilibrium with environment. Protozoans of fresh water then require vacuoles more as their intracellular is hypertonic in association to the exterior. Without dilution mechanism given by the vacuoles, protozoans of fresh water would absorb plenty of water and would die.

   Related Questions in Biology

  • Q : Frequency - Perception Factor

    Repeated external stimulus is more attention -attracting than a single time. Repetition increases our sensitivity and alertness to the stimulus. Thus, greater the frequency with which a sensory stimulus is presented, the greater the chances we select it for attention.

    		•
  • Q : Disadvantages of Bioethanol

    DISADVANTAGE OF BIOETHANOL: A) Bioethanol is easily evaporated hence can’t form a stable blend at higher percentages or use it in pure form. B) At high concentration ethan

    		•
  • Q : Determine the factor eight Determine

    Determine the factor VIII? Explain the genetic disease in which this factor is not present?

    		•
  • Q : Relationship between the menstrual

    Explain the relationship between the menstrual cycle and ovulation?

    		•
  • Q : Define the term pneumatic bones Define

    Define the term pneumatic bones? Answer: Birds encompass light weighted bones with internal spaces filled with air. Such bones are termed as pneumatic bones. This fe

    		•
  • Q : Functions of the organic molecules for

    What are the major functions of the organic molecules for the living beings?

    		•
  • Q : Scheduling for Effective Resource

    Scheduling for Effective Resource Utilisation:A) It is invariably ineffective to always start activities at their ES time: causes peaks and troughs in resource usage (people, materials, equipment and working capital).

  • Q : Functions of connective tissues State

    State general functions of the connective tissues?

    		•
  • Q : Mitosis and de-condensed all through

    Why is it significant for chromosomes to be condensed throughout mitosis and de-condensed all through interphase?

    		•
  • Q : Plant hormone remarkable for fruit

    What is the plant hormone remarkable for fruit ripening and stimulating flowering? What are the uses and practical inconveniences of which hormone?

    		•