Read the following statement A) 6th mass extinction species is being caused anthropogenically and is 10 time faster than the rate of natural extinctions. B) passenger pigeon have become extinct due to over Exploitations of humans. C) Norway has lower ecosystem diversity than India. D) more than 50000 varieties of mango occur in India. choose the option with correct sets of statement
Read the following statement A) 6th mass extinction species is being caused anthropogenically and is 10 time faster than the rate of natural extinctions. B) passenger pigeon have become extinct due to over Exploitations of humans. C) Norway has lower ecosystem diversity than India. D) more than 50000 varieties of mango occur in India. choose the option with correct sets of statement
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(i) Alcohol is an important industiral solvent for paints, lacquers, varnishes, dyes, perfumes, tintures, cough syrups and many other medicines. It is also used an an antiseptic ad disinfectant and can also be used in the manufacture of important chemicals such as ether, chloroform, iodoform, acetic acid, etc. Iit is also being mixed with petrol and is used as a high octane fuel for automobiles. therefore, its production cannot be banned. the best way is to regulate its production and supply.
(ii) Consumption of alcohol is a wide spread social evil. it has ruined many families and is the root cause of many unwanted deaths. therefore, a sense of awareness should be created in the minds of people who are addicted to drunking of alcohol. to do so alcoholics may be shown skits, plays and dramas highlighting bad effects of drinking alcohol. they can also be discouraged from drinking alcohol by writing articles in magazines and newspaper and by sloga writing at public places.
(ii) Consumption of alcohol is a wide spread social evil. it has ruined many families and is the root cause of many unwanted deaths. therefore, a sense of awareness should be created in the minds of people who are addicted to drunking of alcohol. to do so alcoholics may be shown skits, plays and dramas highlighting bad effects of drinking alcohol. they can also be discouraged from drinking alcohol by writing articles in magazines and newspaper and by sloga writing at public places.
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Read the following text and answer the following question on the basis of the same : Excessive exploitation of species , whether a plant or animal reduces the size of its population , so it becomes vulnerable to extinction . Such as Dodo and passenger pigeon have become extinct due to over exploitation by humans . Thus the world is facing accelerated rates of species extinctions , largely due to human interference . Identify a cause of biodiversity loss that is not included in evil quartet ?
Read the following five statements (A to E) about biodiversity and select the option with all correct statements: (A) India has more than 50,000 genetically different strains of rice ,and 1,000 varieties of mango. (B) The Western Ghats have a lesser amphibian species diversity than the Eastern Ghats . ( c ) Scandinavian country like Norway has a greater ecosystem diversity than India. (D) Biodiversity and its conservation are now vital environmental issues of international concern . (E) More and more people around the world the world begin to realise the critical importance of biodiversity for our survival and well - being on this planet.
Knowledge Check
Read the following text and answer the following question on the basis of the same : Excessive exploitation of species , whether a plant or animal reduces the size of its population , so it becomes vulnerable to extinction . Such as Dodo and passenger pigeon have become extinct due to over exploitation by humans . Thus the world is facing accelerated rates of species extinctions , largely due to human interference . _________ is the first major cause of species extinction .
Read the following text and answer the following question on the basis of the same : Excessive exploitation of species , whether a plant or animal reduces the size of its population , so it becomes vulnerable to extinction . Such as Dodo and passenger pigeon have become extinct due to over exploitation by humans . Thus the world is facing accelerated rates of species extinctions , largely due to human interference . _________ is the first major cause of species extinction .
A
Coextinction
B
Over exploitation
C
Habitat destruction
D
Alien species invasion .
Read the following text and answer the following question on the basis of the same : Excessive exploitation of species , whether a plant or animal reduces the size of its population , so it becomes vulnerable to extinction . Such as Dodo and passenger pigeon have become extinct due to over exploitation by humans . Thus the world is facing accelerated rates of species extinctions , largely due to human interference . Factors which make species susceptible to extinction are :
Read the following text and answer the following question on the basis of the same : Excessive exploitation of species , whether a plant or animal reduces the size of its population , so it becomes vulnerable to extinction . Such as Dodo and passenger pigeon have become extinct due to over exploitation by humans . Thus the world is facing accelerated rates of species extinctions , largely due to human interference . Factors which make species susceptible to extinction are :
A
Small population size
B
Higher status of trophic level
C
Inability to switch over to alternate food
D
All of these
Read the following text and answer the following question on the basis of the same : Excessive exploitation of species , whether a plant or animal reduces the size of its population , so it becomes vulnerable to extinction . Such as Dodo and passenger pigeon have become extinct due to over exploitation by humans . Thus the world is facing accelerated rates of species extinctions , largely due to human interference . Assertion : Pollution reduces species biodiversity . Reason : Spillover of oil in sea cause death of serval marine animals .
Read the following text and answer the following question on the basis of the same : Excessive exploitation of species , whether a plant or animal reduces the size of its population , so it becomes vulnerable to extinction . Such as Dodo and passenger pigeon have become extinct due to over exploitation by humans . Thus the world is facing accelerated rates of species extinctions , largely due to human interference . Assertion : Pollution reduces species biodiversity . Reason : Spillover of oil in sea cause death of serval marine animals .
A
Both assertion (A ) and reason (R ) are true and reason (R ) is the correct explanation of Assertion (A) .
B
Both Assertion (A) and reason ( R ) are true but reason (R ) is not the correct explanation of Assertion (A ) .
C
Assertion (A ) is true but reason ( R) is false .
D
Assertion (A) is false but reason (R ) is true .
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Read the following statements : (A) Tropics harbour more species than temperate or polar areas. (B) Colombia located near the equator has nearly 1400 species of birds. (C ) India has less tha 105 species of birds.
The rate of a reaction, which may also be called its velocity or speed, can be defined with relation to the concentration of any of the reacting substances, or to that of any product of the reaction. If the species chosen is a reactant which has a concentration c at time t the rate is - dc/dt, while the rate with reference to a product having a concentration x at time t is dx/dt. Any concentration units may be used for expressing the rate, thus, if moles per liter are employed for concentration and seconds for the time, the units for the rate are moles "liter"^(-1) sec^(-1) . For gas reactions pressure units are sometimes used in place of concentrations, so that legitimate units for the rate would be (mm. Hg) sec^(-1) and atm. sec^(-1) The order of a reaction concerns the dependence of the rate upon the concentrations of reacting substances, thus, if the rate is found experimentally to be proportional to the alpha^(th) power of the concentration of one of the reactants A, to the beta^(th) power of the concentration of a second reactant B, and so forth, via., rate kC_(A)^(alpha) C_(B)^(beta)" " (1) the over-all order of the reaction is simply n = alpha +beta + ---------(2) Such a reaction is said to be of the alpha^(th) order with respect to the substance A, the beta^(th) order with respect to B and so on... (Laidler, K. J., & Glasstone, S. (1948). Rate, order and molecularity in chemical kinetics. Journal of Chemical Education, 25(7), 383.) In the following questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices on the basis of the above passage. Assertion: Rate of reaction is a measure of change in concentration of reactant with respect to time. Reason: Rate of reaction is a measure of change in concentration of product with respect to time.
Read the following statements : (A) India has a greater ecosystem diversity than Norway. (B) According to the IUCN (2004), the total number of plant and animal species described so far is slightly more than 15 millions.
Read the below statements and select the appropriate option. a. Experimental removal of Pisaster resulted in the extinction of more than species of invertebrates. b. Nearly 20 percent of all insects are known to be phytophagous. c Predators help to maintain species diversity.
Which of the following statement/is /are wrong? I. Communities with more species, generally, tend to de more stable than those with less species. II. A stable community should show too much variation in productivity from year to year. III. The colonisation of tropical pacific Islands by humans is said to have led to the extinction of more than 2,000 species of native birds. IV. The accelerated rates of species extinctions that the world is facing now have nothing to do with human activities. V. The biological wealth of our planet has been declining rapidly and the accusing finger is clearly pointing to human activities .
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