The acidification of oceans is increasing. Why is this phenomenon a cause of concern?
1. The growth and survival of calcareous phytoplankton will be adversely affected.
2. The growth and survival of coral reefs will be adversely affected.
3. The survival of some animals that have phytoplanktonic larvae will be adversely affected.
4. The cloud seeding and formation of clouds will be adversely affected. Which among the statements given above is/are correct?
Prelims
-
Environment › Marine Ecosystem
Environment › Marine Ecosystem
Options
Answer
(A)
-
Environment › National Parks
-
Environment › PollutionXSources
Environment › PollutionXSources
Lead, ingested or inhaled, is a health hazard. After the addition of lead to petrol has been banned, what still are the sources of lead poisoning? 1. Smelting units 2. Pens and pencils 3. Paints 4. Hair oils and cosmetics Select the correct answer using the code given below:
Options
Answer
(B)
-
Environment › PollutionXSources
Consider the following statements: Chlorofluorocarbons, known as ozone depleting substances, are used 1. In the production of plastic foams 2. In the production of tubeless tyres 3. In cleaning certain electronic components 4. As pressurizing agents in aerosol cans Which of the statements given above is/are correct?
Options
Answer
(C)
-
Environment › SpeciesXExotic/Invasive
Environment › SpeciesXExotic/Invasive
The Government of India encourages the cultivation of ‘sea buckthorn ‘. What is the importance of this plant? 1. It helps in controlling soil erosion and in preventing desertification. 2. It is a rich source of biodiesel. 3. It has nutritional value and is well-adapted to live in cold areas of high altitudes. 4. Its timber is of great commercial value.
Options
Answer
(C)
-
Environment › SpeciesXHabitat
-
Environment › SpeciesXPeculiar features
-
Environment › SpeciesXThreats and Conservation efforts
-
Environment › Wetlands