Which one of the following is the well known example of bioindicator of air pollution?
Which of the following statements is NOT true?
The environment modified by human activities is called
With reference to Eutrophication, which of the following statements is/are correct?
1) It is a phenomenon of nutrient enrichment of a water body.
2) It depletes dissolved oxygen of the water.
Select the correct answer using the codes given below:
Which of the following statements is true about ecosystem?
Tulsi plant has medicinal values due to the presence of which of the following?