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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.


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