Q20. With reference to the planet Earth, consider the following statements:

I. Rain forests produce more oxygen than that produced by oceans.

II. Marine phytoplankton and photosynthetic bacteria produce about 50% of world's oxygen.

III. Well-oxygenated surface water contains several folds higher oxygen than that in atmospheric air.

Which of the statements given above is/are correct?

Consider the following description: 1. Annual and daily range of temperatures is low. 2. Precipitation occurs throughout the year. 3. Precipitation varies between 50 cm to 250 cm. What is this type of climate?

Consider the following statements: Statement-I: The soil in tropical rain forests is rich in nutrients. Statement-II: The high temperature and moisture of tropical rain forests cause dead organic matter in the soil to decompose quickly. Which one of the following is correct in respect of the above statements?

Consider the following trees: 1. Jackfruit (Artocarpus heterophyllus) 2. Mahua (Madhuca indic) 3. Teak (Tectona grandis) How many of the above are deciduous trees?

The “Miyawaki method” is well known for the:

“If rainforests and tropical forests are the lungs of the Earth, then surely wetlands function as its kidneys.” Which one of the following functions of wetlands best reflects the above statements?

The vegetation of savannah consists of grassland with scattered small trees, but extensive areas have no trees. The forest development in such areas is generally kept in check by one or more or a combination of some conditions. Which of the following are such conditions? 1. Burrowing animals and termites 2. Fire 3. Grazing herbivores 4. Seasonal rainfall 5. Soil properties Select the correct answer using the codes given below

“Leaf litter decomposes faster than in any other biome and as a result the soil surface is often almost bare. Apart from trees, the vegetation is largely composed of plant forms that reach up into the canopy vicariously, by climbing the trees or growing as epiphytes, rooted on the upper branches of trees”. This is the most likely description of

Which one of the following National Parks lies completely in the temperate alpine zone?

Consider the following States: 1. Chhattisgarh     2. Madhya Pradesh 3. Maharashtra     4. Odisha With reference to the States mentioned above, in percentage of forest cover to the total area of State, one of the following is the correct ascending order:

With reference to ‘Red Sanders’, sometimes seen in the news, consider the following statements 1. It is a tree species found in a part of South India. 2. It is one of the most important trees in the tropical rain forest areas of South India. Which of the statements given above is/are correct?

Which one of the following regions of India has a combination of mangrove forest, evergreen forest and deciduous forest?

In a particular region in India, the local people train the roots of living trees into robust bridges across the streams. As the time passes, these bridges become stronger. These unique ‘living root bridges’ are found in

Which one of the following National Parks has a climate that varies from tropical to subtropical, temperate and arctic?

Consider the following States: 1. Arunachal Pradesh 2. Himachal Pradesh 3. Mizoram In which of the above States do ‘Tropical Wet Evergreen Forests’ occur?

In India, in which one of the following types of forests is teak a dominant tree species?

“Each day is more or less the same, the morning is clear and bright with a sea breeze; as the Sun climbs high in the sky, heat mounts up, dark clouds form, and then the rain comes with thunder and lightning. But rain is soon over.” Which of the following regions is described in the above passage?

The seasonal reversal of winds is the typical characteristic of

If you travel through the Himalayas, you are likely to see which of the following plants naturally growing there? 1. Oak 2. Rhododendron 3. Sandalwood Select the correct answer using the code given below.

Which of the following is/are unique characteristic/characteristics of equatorial forests? 1. Presence of tall, closely set trees with crowns forming a continuous canopy 2. Coexistence of a large number of species 3. Presence of numerous varieties of epiphytes Select the correct answer using the codes given below.

"Climate is extreme, rainfall is scanty and the people used to be nomadic herders." The above statements best describe which of the following regions?

A particular State in India has the following characteristics: 1. It is located on the same latitude which passes through northern Rajasthan. 2. It has over 80% of its area under forest cover. 3. Over 12% of forest cover constituted Protected Area Network in this State. Which one among the following States has all the above characteristics?

Which one of the following is the characteristic climate of the Tropical Savannah Region?

If a tropical rainforest is removed, it does not regenerate quickly as compared to a tropical deciduous forest. This is because

The Himalayan Range is very rich in species diversity. Which one among the following is the most appropriate reason for this phenomenon?

A geographic area with an altitude of 400 metres has the following characteristics. (2010)

If this geographic area were to have a natural forest, which one of the following would it most likely be?

A geographic region has the following distinct characteristics: 1. Warm and dry climate 2. Mild and wet winter 3. Evergreen oak trees The above features are the distinct characteristics of which one of the following regions?

The approximate representation of land use classification in India is

In India, which type of forest among the following occupies the largest area?

Which one of the following is not essentially a species of the Himalayan vegetation?

Consider the following statements: 1. The forest cover in India constitutes around 20% of its geographical area. Out of the total forest cover, dense forest constitutes around 40%. 2. The National Forestry Action Programme aims at bringing one-third of the area of India under tree forest cover. Which of the statements given above is/are correct?

Amongst the following Indian States which one has the minimum total forest cover?

Which one among the following covers the highest percentage of forest area in the world?

Which one among the following covers the highest percentage of forest area in the world?

A: Unlike temperate forests, tropical rain forests, if cleared, can yield productive farmland that can support intensive agriculture for several years even without chemical fertilizers. R: The primary productivity of the tropical rainforest is very high when compared to that of temperate forests.

Consider the following statements: 1. In equatorial regions, the year is divided into four main seasons 2. In the Mediterranean region, summer receives more rain 3. In China type climate, rainfall occurs throughout the year 4. Tropical highlands exhibit vertical zonation of different climates Which of these statements are correct?

Open stunted forests with bushes and having long roots and sharp thorns or spines are commonly found in

Match List-I (Mangrove) with List-II (State) and select the correct answer: List-I: A. Achra Ratnagiri B. Coondapur C. Pichavaram D. Vembanad List-II: 1. Karnataka 2. Kerala 3. Andhra Pradesh 4. Maharashtra 5. Tamil Nadu Codes: A B C D

Consider the following ecosystems: 1. Taiga 2. Tropical evergreen 3. Tropical deciduous 4. Tundra The correct sequence in decreasing order of the albedo values of these ecosystems is

Epiphytes are plants, which depend on other plants for

The temperature and rainfall of a meteorological station are given below: Average temperature: 12.8°C Average Rainfall: 54.9 cm per annum Identify the region having the above climatic pattern from among the following

Consider the following temperature and rainfall data: The climate to which this data pertains is

The minimum land area recommended for forest cover to maintain proper ecological balance in India is

Match List I with List II and select the correct answer using the codes given below the lists: List I (Timber) A. Cedar B. Douglas Fir C. Mahogany D. Teak List II (Country) 1. Myanmar 2. Canada 3. Mexico 4. Honduras Codes: A B C D

Consider the following temperature and rainfall data:

The climate to which this data pertains is

Consider the following climatic conditions (Northern Hemisphere): (1998)

These are most likely to be found in the natural regions of

Forest areas have been labelled as 1, 2, 3 and 4 in the map: Among these, those which were threatened in 1997 by a serious epidemic include:

Which one of the following pairs is correctly matched?

Given below are two statements, one labelled as Assertion and the other labelled as Reason (R) Assertion (A): Mangroves are very specialized forest eco-systems of tropical and sub-tropical regions bordering certain seacoasts. Reason (R): They stabilize the shoreline and act as bulwark against encroachments by the sea. In the context of the above two statements, which one of the following is correct?

The greatest diversity of animal and plant species occurs in

Silent Valley Project has been abandoned for

The best quality of hard wood for the manufacture of furniture is obtained from

Of the following forest regions, the most suitable wood for paper pulp is available from

Shifting cultivators normally grow:

Deforestation results in (1) Flora destruction (2) Fauna destruction (3) Ecological disbalance

The largest reserve of ‘Sal’ forests is found in

Savanna grasslands are found in

The trees of spruce, fir, pine, etc. are found in which of the following natural regions of the earth?

Massive deforestation causes

The tropical deciduous trees shed their leaves in summer

To check the expansion of Thar desert which of the following measures should be vied?

Tropical rain forests appear in which of the following regions?

Age of tree can be estimated by

Flame of the forest is

What are the grass lands of South America called?

When a person moves from poles to the equator, the population of plants and animals will

Pampas are the vast grassy plains of

‘Jhum Cultivation’ is connected with

Age of a tree can be determined.

In which of the following States the yield of forest wealth per acre is highest?

The cutting of forests leads to