question_answer 21)

  What is common to Lantana, Eichhornia and African catfish? (a) All are endangered species of India (b) All are key stone species (c) All are mammals found in India (d) All the species are neither threatened nor indigenous species of India.

Answer:

                  (d) Ail the three above mentioned species are neither threatened nor indigenous species of India. Lantana, Eichhornia (water hyacinth) and African catfish (Clariasgariepinus) all are alien (exotic species) which are invasive and have an harmful impact resulting in extinction of the indigenous species.