Montreal protocol which calls for appropriate action to protect the ozone layer from human activities was passed in the year:
- 1986
- 1987
- 1988
- 1985
The Correct Option is B
Solution and Explanation
The Montreal Protocol was adopted on September 16, 1987, and it is an international treaty aimed at phasing out the production and use of ozone-depleting substances, such as chlorofluorocarbons (CFCs) and halons, to protect the Earth's ozone layer.
So, the correct option is (B): 1987
Top Questions on Biodiversity and Conservation
- State any two criteria for determining biodiversity hotspots.
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- Describe the Species-Area relationship as observed by Alexander von Humboldt, for a wide variety of taxa in nature.
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- Name the type of heterogamety observed in most birds.
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- Match List-I with List-II:Choose the correct answer from the options given below:
List-I List-II A. Biodiversity hotspot I. Khasi and Jantia hills in Meghalaya B. Sacred groves II. World Summit on Sustainable C. Johannesburg South Africa III. Parthenium D. Alien species invasion IV. Western Ghats - NEET (UG) - 2024
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Questions Asked in NEET exam
- Given below are two statements:
Statement I: Fig fruit is a non-vegetarian fruit as it has enclosed fig wasps in it.
Statement II: Fig wasp and fig tree exhibit a mutual relationship as the fig wasp completes its life cycle in the fig fruit and the fig fruit gets pollinated by the fig wasp. - A wire of resistance \(R\) is cut into 8 equal pieces. From these pieces, two equivalent resistances are made by adding four of these together in parallel. Then these two are added in series. The net effective resistance of the combination is:
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- With the help of the given pedigree, find out the probability for the birth of a child having no disease and being a carrier (has the disease mutation in one allele of the gene) in the F3 generation.
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- The plates of a parallel plate capacitor are separated by d. Two slabs of different dielectric constant \(K_1\) and \(K_2\) with thickness \(d/2\) and \(d/2\) respectively are inserted in the capacitor. Due to this, the capacitance becomes two times larger than when there is nothing between the plates. If \(K_1 = 1.25 K_2\), the value of \(K_2\) is :
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A sphere of radius R is cut from a larger solid sphere of radius 2R as shown in the figure. The ratio of the moment of inertia of the smaller sphere to that of the rest part of the sphere about the Y-axis is :
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Concepts Used:
Biodiversity and Conservation
The term ‘biodiversity’ is derived from the two words- ‘bios' which means life and ‘diversity’ i.e, differentiation or variation. Edward Wilson, the sociobiologist was the first to popularise the term ‘biodiversity’ in the year 1992. The term implies the occurrence of various plants and animals along with their variants such as biotypes, ecotypes and genes on earth. In our biosphere, the immense diversity or heterogeneity remains not only at the species level but also, at every level of biological organization that ranges from macromolecules in the cells to biomes.
Biodiversity and Conservation is a topic covered under the fifteenth chapter and Unit 5 of NCERT class 12 biology.