Q76. Consider the following statements : 1. Most of the world's coral reefs are in tropical waters. 2. More than one-third of the world's coral reefs are located in the territories of Australia, Indonesia and Philippines. 3. Coral reefs host far more animal phyla than those hosted by tropical rainforests. Which of the statements given above is/are correct ?

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 a

Which of the following have coral reefs? 1. Andaman and Nicobar Islands 2. Gulf of Kachchh 3. Gulf of Mannar 4. Sunderbans Select the correct answer using the

What would happen if phytoplankton of an ocean is completely destroyed for some reason? 1. The ocean as a carbon sink would be adversely affected. 2. The food c

With reference to the United Nations Convention on the Law of Sea, consider the following statements: 1. A coastal state has the right to establish the breadth

Consider the following statements: 1. The Global Ocean Commission grants licences for seabed exploration and mining in international waters. 2. India has receiv

Consider the following statements: 1. Biodiversity is normally greater in the lower latitudes as compared to the higher latitudes. 2. Along the mountain gradien

The scientific view is that the increase in global temperature should not exceed 2°C above the pre-industrial level. If the global temperature increases beyond

Consider the following regions : 1. Eastern Himalayas 2. Eastern Mediterranean region 3. North-Western Australia Which of the above is/are Biodiversity Hotspot(

Which of the following is/are unique characteristics/characteristics of equatorial forests ? 1. Presence of tall, closely set trees with crowns forming a contin

In the context of ecosystem productivity, marine upwelling zones are important as they increase marine productivity by bringing the: 1. Decomposer microorganism

Which of the following statements are correct about the deposits of ‘methane hydrate’? 1. Global warming might trigger the release of methane gas from these dep

Consider the following statements: 1. Some microorganisms can grow in environments with temperature above the boiling point of water. 2. Some microorganisms can

Mycorrhizal biotechnology has been used in rehabilitating degraded sites because mycorrhiza enables the plants to 1. Resist drought and increase absorptive area

There is a concern over the increase in harmful algal blooms in the seawaters of India. What could be the causative factors for this phenomenon? 1. Discharge of

Consider the following statements: 1. Agricultural soils release nitrogen oxides into the environment. 2. Cattle release ammonia into the environment. 3. Poultr

Consider the following statements: 1. Total land area of earth is approximately 1475 lakh square kilometers. 2. Ratio of land area to water area of earth is app

Which of the following have species that can establish a symbiotic relationship with other organisms? 1. Cnidarians 2. Fungi 3. Protozoa Select the correct ans

With reference to an organisation known as ‘BirdLife International’, which of the following statements is/are correct? 1. It is a Global Partnership of Conserva

In the context of mitigating the impending global warming due to anthropogenic emissions of carbon dioxide, which of the following can be potential sites for ca

With reference to an initiative called ‘The Economics of Ecosystems and Biodiversity (TEEB)’, which of the following statements is/are correct? 1. It is an init

Due to some reasons, if there is a huge fall in the population of species of butterflies, what could be its likely consequence/consequences? 1. Pollination of s

Consider the following statements: 1. The boundaries of a National Park are defined by legislation. 2. A Biosphere Reserve is declared to conserve a few specifi

Which of the following statements is/are correct? Proper design and effective implementation of UN-REDD+ Programme can significantly contribute to: 1. protectio

Which of the following statements is/are correct? Viruses can infect 1. Bacteria 2. Fungi 3. Plants Select the correct answer using the code given below.

Human activities in the recent past have caused the increased concentration of carbon dioxide in the atmosphere, but a lot of it does not remain in the lower at

With reference to ‘palm oil’, consider the following statements: 1. The palm oil tree is native to Southeast Asia. 2. Palm oil is a raw material for some indust

Consider the following statements: 1. The boundaries of a National Park are defined by legislation. 2. A Biosphere Reserve is declared to conserve a few specifi

Consider the following statements : 1. The axis of the earth’s magnetic field is inclined at 23 and half to the geographic axis of the earth. 2. The earth’s mag

It is possible to produce algae based biofuels, but what is/are the likely limitation(s) of developing countries in promoting this industry? 1. Production of al

Consider the following animals: 1. Sea cow 2. Sea horse 3. Sea lion Which of the above is/are mammal/mammals?

Consider the following statements: 1. The Earth’s magnetic field has reversed every few hundred thousand years. 2. When the Earth was created more than 4000 mil

Consider the following statements: 1. In the tropical zone, the western sections of the oceans are warmer than the eastern sections owing to the influence of tr

With reference to the role of biofilters in Recirculating Aquaculture System, consider the following statements: 1. Biofilters provide waste treatment by removi

Which of the following is/are correct inference/inferences from isothermal maps in the month of January? 1. The isotherms deviate to the north over th

With reference to Ocean Mean Temperature (OMT), which of the following statements is/are correct? 1. OMT is measured up to a depth of 26°C isotherm wh

With reference to ‘Indian Ocean Dipole (IOD)’ sometimes mentioned in the news while forecasting Indian monsoon, which of the following statements is/a

What explains the eastward flow of the equatorial counter current?

Tides occur in the oceans and seas due to which among the following? 1. Gravitational force of the Sun 2. Gravitational force of the Moon 3. Centrifug

The most important fishing grounds of the world are found in the regions where:

Consider the following factors: 1. Rotation of the Earth 2. Air pressure and wind 3. Density of ocean water 4. Revolution of the Earth Which of the ab

La Nina is suspected to have caused recent floods in Australia. How is La Nina different from El Nino? 1. La Nina is characterized by unusually cold o