Challenger App

No.1 PSC Learning App

1M+ Downloads
What is Eicchornia called?

AThe carrot grass

BNile perch

CWater hyacinth

DWater lily

Answer:

C. Water hyacinth

Read Explanation:

  • Eichhornia crassipes also known as water hyacinth.

  • It was first introduced from South America into China that later on became a serious environmental problem.

  • It reduces the sunlight penetration and lowers the oxygen content in the water that hampers the water ecosystem.


Related Questions:

മൃഗങ്ങളിലെ സഹജമായ പെരുമാറ്റത്തെ വിശദീകരിക്കുന്നതിനുള്ള Innate Releasing Mechanism (IRM) എന്ന ആശയം കോൺറാഡ് ലോറൻസുമായി ചേർന്ന് വികസിപ്പിച്ചത് ആരാണ്?
Which one of the following is said to be the most important cause or reason for the extinction of animals and plants?

Consider the following statements regarding the characteristics of mock drills.

  1. Mock drills typically involve a smaller number of participants compared to broader exercises.
  2. The realism of a mock drill is enhanced through the mobilization of both personnel and equipment.
  3. The primary goal of a mock drill is to test the theoretical knowledge of participants without involving practical application.

    Choose the correct statements concerning the characteristics that define an epidemic.

    1. An epidemic requires the disease to be entirely new to the affected region, never having occurred there before.
    2. It involves an unusual increase in the number of cases, exceeding what is typically expected for a given time period or geographical area.
    3. An epidemic always spreads globally, irrespective of initial localized increases.
    4. The identification of an epidemic often relies on epidemiological surveillance data indicating a deviation from baseline disease activity.
      In which of the following interactions neither of the two species is benefited nor harmed?