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Which statements correctly characterize Plankton?

  1. Plankton possess strong swimming abilities to counteract water currents.
  2. This group includes both microscopic plants (phytoplankton) and animals (zooplankton).
  3. Their distribution is primarily determined by the water currents due to limited locomotive power.
  4. Plankton are only found in calm freshwater ecosystems.

    A1, 4

    B2, 3

    C3 only

    D3, 4

    Answer:

    B. 2, 3

    Read Explanation:

    PLANKTON

    • This group includes both microscopic plants (phytoplankton) and animals (zooplankton) found in all aquatic ecosystems, except certain swift moving waters.

    • The locomotory power of the planktons is limited so that their distribution is controlled largely, by currents in the aquatic ecosystems.

    • Planktons are divisible into Plants (chiefly algae) known as Phytoplankton

    • Animals (primarily crustaceans and protozoans) known as Zooplankton.


    Related Questions:

    Explain the role of decomposers in oxygen stratification.

    1. Decomposers increase oxygen levels by breaking down organic matter.
    2. Decomposers consume oxygen, leading to lower concentrations at the bottom.
    3. Decomposers are primarily found in the well-lighted surface layer.
    4. The activity of decomposers is independent of oxygen levels.
      കണ്ടൽവനങ്ങളിൽ ഉയർന്ന അളവിൽ സംഭരിക്കപ്പെടുന്ന കാർബൺ അറിയപ്പെടുന്നത് എങ്ങനെ?

      അന്തരീക്ഷത്തിൽ കാണപ്പെടുന്ന വാതകങ്ങളെ അവയുടെ അളവിന്റെ അവരോഹണ ക്രമത്തിൽ ക്രമീകരിക്കുക? 

             1. നൈട്രജൻ     

            2. ആർഗൺ 

            3.  ഓക്സിജൻ 

            4.  CO2 

       

      Regarding the definition of 'species', identify the correct statements.

      1. A species is the basic unit of classification in biology.
      2. Members of the same species typically interbreed freely with one another under natural conditions.
      3. Individuals from different species can freely interbreed and produce fertile offspring.
        The movement of elements or compounds through living beings and across the ecosystem in form of characteristic pathways is known as what?