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1351.

Startification is useful inA. Better use of resourcesB. Accommodation of larger number of speciesC. Modification of environmentD. All the above

Answer» Correct Answer - D
1352.

A succession that does not follow the natural course due to human activity isA. SubsereB. plagiosereC. prisereD. asere.

Answer» Correct Answer - B
1353.

Pheromone isA. Product of endocrine glandB. A proteinC. mRNAD. Used for animal communication

Answer» Correct Answer - D
1354.

Male Atlas Moth has huge antennae that can detect pheromone released by female moth from a distance ofA. 1 kmB. 3 kmC. 5 kmD. 8 km

Answer» Correct Answer - D
1355.

An animal that uses ultra-violet radiations for locating food and boundary of its territory isA. desert iguanaB. desert frogC. kangaroo ratD. sea snake.

Answer» Correct Answer - A
1356.

In foggy and hazy environment, birds are able to locate position of sun and their path by means ofA. infra-red wavelengthB. ultra-violet radiationsC. magnetic systemD. pheromones

Answer» Correct Answer - B
1357.

$ living organisms can exist alone ! A population is a group of organisms of entirely different species occupying a particular area.A. If both As and R are correct and R is correct explanation of AsB. If both As and R are correct but R is not correct explanation of AsC. If As is correct, R is wrongD. If both As and R are wrong.

Answer» Correct Answer - D
1358.

$ The approximate distance between the sun and the Earth is about 148.7 million km. ! The dimensions of the habitates, regions of the earth are about 22.5 kmA. If both As and R are correct and R is correct explanation of AsB. If both As and R are correct but R is not correct explanation of AsC. If As is correct, R is wrongD. If both As and R are wrong.

Answer» Correct Answer - B
1359.

Prion consists ofA. ProteinB. RNAC. DNAD. Both B and C

Answer» Correct Answer - A
1360.

$ Life on earth originated by interaction of the various chemical substances in the broth of the sea. ! The first organisms were, pherhaps the chemoautotrophs and anaerobes.A. If both As and R are correct and R is correct explanation of AsB. If both As and R are correct but R is not correct explanation of AsC. If As is correct, R is wrongD. If both As and R are wrong.

Answer» Correct Answer - A
1361.

$ solar system has 15 planets. ! Earth is the major member of the solar systemA. If both As and R are correct and R is correct explanation of AsB. If both As and R are correct but R is not correct explanation of AsC. If As is correct, R is wrongD. If both As and R are wrong.

Answer» Correct Answer - D
1362.

$ The entire material world which can be seen and detected with instrument is like microscops and telescope is called universe. ! Living organisms are unevenly distributed in the biosphereA. If both As and R are correct and R is correct explanation of AsB. If both As and R are correct but R is not correct explanation of AsC. If As is correct, R is wrongD. If both As and R are wrong.

Answer» Correct Answer - B
1363.

Ozone hole over antarctica was first detected byA. Molina and rowlandB. Farmanet alC. AugusD. molina and molina

Answer» Correct Answer - B
1364.

Direction of light is detected byA. PhytochromeB. AmyloplantsC. CarotenoidsD. Plant receptors

Answer» Correct Answer - C
1365.

Movement of auxin isA. CentripetalB. BasipetalC. AcropetalD. Both (B)and (C)

Answer» Correct Answer - B
1366.

Development of fruite without fertilisation isA. ParthenogensisB. ParthenocarpyC. AposporyD. Apogamy

Answer» Correct Answer - B
1367.

Hormone responsible for ageing isA. GAB. IAAC. ABAD. Ctykinin

Answer» Correct Answer - C
1368.

A major cause of mortality of many birds visitors of aquatic habitat isA. Nutrient enrichmentB. Lead poisoningC. Salt enrichmentD. All the above

Answer» Correct Answer - B
1369.

World Conservation Union maintainsA. Red Data BookB. Red ListC. Pink ListD. Both A and B

Answer» Correct Answer - D
1370.

A lake which is rich in organic waste may result inA. increased population of aquatic organisms due to mineralsB. drying of the lake due to algal bloomC. increased population of fish due to lots of nutrientsD. mortality of fish due to lack of oxygen

Answer» Correct Answer - D
When much of organic matter is present in lake, lots of microbial activity takes place in its decomposition process. So, demand for oxygen increases. This increases `O_(2)` demand depletes the dissolved oxygen in water at faster rates. This adversely affects the living conditions for other organisms like fishes, etc. ultimately causing their death.
1371.

Common between sclerenchyma and collenchyma isA. Material transportB. Conduction of water and mineralsC. Providing buoyancyD. Providing support

Answer» Correct Answer - D
1372.

Longest fibres are found inA. JuteB. CottonC. Sun HempD. Coir

Answer» Correct Answer - A
1373.

Epidermis and epiblema are produced fromA. PhellogenB. CalytrogenC. ProcambiumD. Protoderm

Answer» Correct Answer - D
1374.

Increase in concentration of the toxicant at successive tropic levels is known asA. biomagnificationB. biodeteriorationC. biotransformationD. biogeochemical cycling

Answer» Correct Answer - A
Biomagnification is the sequence of processes in an ecosystem by which higher concentration of particular toxicant, such as the pesticide or heavy metal are reached in higher organisms of the food chain, generally through a series of prey-predator relationships.
1375.

Which of the following are most suitable indicators of `SO_(2)` pollution in the environment ?A. LichensB. ConifersC. AlgaeD. Fungi

Answer» Correct Answer - A
Lichens are useful bioindicators for air pollution, especially sulphur dioxide pollution, since they derive their water and essential nutrients mainly from the atmosphere rather than from soil.
1376.

$ All the living and non living matter is formed of molecules. ! Molecules are of two types (i) Micro-molecules (ii) Macro-molecules.A. If both As and R are correct and R is correct explanation of AsB. If both As and R are correct but R is not correct explanation of AsC. If As is correct, R is wrongD. If both As and R are wrong.

Answer» Correct Answer - A
1377.

$ "A" DNA contains eleven base pairs. ! "Z" DNA contains only nine base pairs.A. If both As and R are correct and R is correct explanation of AsB. If both As and R are correct but R is not correct explanation of AsC. If As is correct, R is wrongD. If both As and R are wrong.

Answer» Correct Answer - C
1378.

$ Night blindness is due to deficiency of vitamin "A" ! Actually the term vitamin means vital minerals.A. If both As and R are correct and R is correct explanation of AsB. If both As and R are correct but R is not correct explanation of AsC. If As is correct, R is wrongD. If both As and R are wrong.

Answer» Correct Answer - A
1379.

$ Minerals such as carbonates and phosphates acts as buffers. ! Biomolecules contain only 25 elements out of the 109 known elements.A. If both As and R are correct and R is correct explanation of AsB. If both As and R are correct but R is not correct explanation of AsC. If As is correct, R is wrongD. If both As and R are wrong.

Answer» Correct Answer - B
1380.

$ Slime mouls are mainly saprophytic. ! Saprophytes get their nutrition from a host.A. If both As and R are correct and R is correct explanation of AsB. If both As and R are correct but R is not correct explanation of AsC. If As is correct, R is wrongD. If both As and R are wrong.

Answer» Correct Answer - C
1381.

$ Amoeba is a type of sporozoan. ! Sporozonas have two contractile vacules.A. If both As and R are correct and R is correct explanation of AsB. If both As and R are correct but R is not correct explanation of AsC. If As is correct, R is wrongD. If both As and R are wrong.

Answer» Correct Answer - D
1382.

$ Forminiferance have a calcareous shell. ! Dimorphic nucleic are present in Paramacium.A. If both As and R are correct and R is correct explanation of AsB. If both As and R are correct but R is not correct explanation of AsC. If As is correct, R is wrongD. If both As and R are wrong.

Answer» Correct Answer - B
1383.

What measures can be taken to control the emission of air pollutants from automobiles?A. Proper maintenance of automobilesB. Use of lead-free petrol or dieselC. Use of catalytic convertersD. All of the above

Answer» Correct Answer - D
Proper maintenance of automobiles, use of lead-free petrol or diesel and catalytic converters are measres can be taken to control the emission of air pollutants from automobiles.
1384.

As the automobile exhaust passed through the catalytic converterA. Unburnt hydrocarbons are converted into carbon dioxide and waterB. Carbon monoxide are changed to carbon dioxideC. Nitric oxide are changed to nitrogen gasD. All of the above

Answer» Correct Answer - D
As the automobile exhaust passed through the cataytic converter unburnt hydrocarbons are converted into carbon dioxide and water, carbon monoxide are changed to carbon dioxide and nitric oxide are changed to nitrogen gas.
1385.

(A) : Small animals have a larger surface area relative to their volume. (R) : They tend to lose body temperature very slowly when it is cold out side.A. If both (A) and (R) are true but (R) is not the correct explanation of (A).B. If both (A) and (R) are true and (R) is the correct explanation of (A).C. If (A) is true but (R) is false.D. If both (A) and (R) are false.

Answer» Correct Answer - C
1386.

(A) : The availability of light on land is closely linked with that of temperature. (R) : The sun is the source of both light and temperature.A. If both (A) and (R) are true but (R) is not the correct explanation of (A).B. If both (A) and (R) are true and (R) is the correct explanation of (A).C. If (A) is true but (R) is false.D. If both (A) and (R) are false.

Answer» Correct Answer - A
1387.

A stage of suspended development is called Diapause.

Answer» Correct Answer - T
1388.

Match the columns and choose the right option A. i-b,ii-c,iii-aB. i-c,ii-a,iii-bC. i-a,ii-b,iii-cD. i-b,ii-a,iii-c

Answer» Correct Answer - A
1389.

A lake with an inflow of domestic sewage rich in organic waste may result inA. Death of fish due to lack of oxygenB. Drying of the river/lake very soon due to algal bloomsC. Increase population of aquatic food web organismsD. An increased production of fish due to biodegradable nutreints.

Answer» Correct Answer - A
1390.

One of the most polluted rivers in maharashtra isA. BrahmputraB. GangaC. JamnunaD. Panchaganga.

Answer» Correct Answer - D
1391.

Ozone layer was discovered byA. CoriolisB. febryC. WienerD. Diener

Answer» Correct Answer - B
1392.

The Government of India has passed the environment (Protection) Act in the yearA. 1986B. 1981C. 1974D. 1968

Answer» Correct Answer - A
1393.

Match the following A. i-e,ii-d,iii-c,iv-bB. i-d,ii-e,iii-b,iv-cC. i-c,ii-b,iii-d,iv-aD. i-b,ii-c,iii-d,iv-e

Answer» Correct Answer - B
1394.

Black lung disease is common in:A. farmersB. workers of textile industriesC. coal minersD. refinery workers

Answer» Correct Answer - C
1395.

Select the correct statements about particularly matterA. `10 mum` size creates severe lung damageB. more than 2.5 `mu` m gets trapped in lungs and causes problemsC. Less than `2. 5 mu m` penetrates deep into lungsD. None of the above

Answer» Correct Answer - C
1396.

Allerthrin isA. FertilizerB. HerbicideC. Growth hormoneD. Insecticide.

Answer» Correct Answer - D
1397.

Vertical distribution of different species occupying different levels is called stratification.

Answer» Correct Answer - T
1398.

$ Halophytes are those plants which grow in salty soils. Heliophytes are those plants which grown in direct sunlightA. If both As and R are correct and R is correct explanation of AsB. If both As and R are correct but R is not correct explanation of AsC. If As is correct, R is wrongD. If both As and R are wrong.

Answer» Correct Answer - B
1399.

Match the following Column I with Column II. `{:("Column I","Column II"),("A. Zooplankton","1. 0.003 ppm"),("B. Small fishes","2. 2 ppm"),("C. Water","3. 25 ppm"),("D. Fish eating birds","4. 0.04 ppm"),("E. Big fishes","5. 0.5 ppm"):}`A. `{:("A","B","C","D","E"),(2,1,4,5,3):}`B. `{:("A","B","C","D","E"),(4,5,1,2,3):}`C. `{:("A","B","C","D","E"),(4,5,3,2,1):}`D. `{:("A","B","C","D","E"),(4,5,1,3,2):}`

Answer» Correct Answer - D
1400.

The common indicator organism of water pollution isA. Entamoeba histolyticaB. Lemna paucicostataC. Eichhornia crassipesD. Escherichia coli

Answer» Correct Answer - D