1382 + Interview Questions in ECOSYSTEM IN GENERAL AWARENESS Page 19 InterviewSolution

901.	Choose the incorrect statements. I. Plant absorbed phosphates in the form of `H_(2)PO_(4)^(-)`. II. Reservior of phosphorus in atmosphere. III. Most of the phosphates deposited in deep ocean as sediments. IV. Plant absorbed organic phosphates.A. II and IVB. II and IIIC. I and IVD. I and III
Answer» Correct Answer - C

Discussion

902.	Phosphates remain outside the natural cycle for a long timeA. When they form compounds with metalsB. When they are incorporated in bones and teethC. When the bodies of the organisms excrete and decomposeD. Both (1) and (2)
Answer» Correct Answer - D

Discussion

903.	Which of the following ecosystem has very little primary productivity?A. RiverB. EstuaryC. LakeD. Marsh
Answer» Correct Answer - A

Discussion

904.	Which ecosystem has the maximum biomass ?A. Forest ecosystemB. Grassland ecosystemC. Pond ecosystemD. Lake ecosystem
Answer» Correct Answer - D

Discussion

905.	Phosphates remain outside the natural cycle for a long timeA. When they from compounds with metalsB. When they are incorported in bone and teethC. When the bodies of the organisms excrete and decomposeD. Both (1) & (2)
Answer» Correct Answer - B

Discussion

906.	Chief producers in the oceasns areA. DinoflagellatesB. DiatomsC. CyanobacteriaD. Euglenoids
Answer» Correct Answer - B

Discussion

907.	In an ecosystem, which one shows one-way passageA. free energyB. carbonC. nitrogenD. potassium
Answer» Correct Answer - A

Discussion

908.	Atmospheric input is negligible inA. Carbon cycleB. Phosphorus cycleC. Oxygen cycleD. Nitrogen cycle
Answer» Correct Answer - D

Discussion

909.	Consider the following statements about carbon cycle and choose how many statments are correct ?A. TwoB. ThreeC. FourD. Five
Answer» Correct Answer - B

Discussion

910.	Identify the plant belonging to the reed-swamp stage in hydrosere successionA. JuncusB. SagittariaC. SalixD. Trapa
Answer» Correct Answer - B

Discussion

911.	In the hydrosere the reed - swamp stage is followed byA. Marsh -meadow stageB. Submerged free floating plant stageC. Submerged plant, stageD. Phytoplankton
Answer» Correct Answer - B

Discussion

912.	Which one occurs at same trophic levelA. Crow and cowB. Snake and earthwormC. Tiger and rabbitD. Deer and bees
Answer» Correct Answer - D

Discussion

913.	Hydrosere start with which stageA. submerged stageB. reed swamp stageC. plankton stageD. sedge meadow stage
Answer» Correct Answer - C

Discussion

914.	Hydrilla and Utricularia are found inA. submerged stageB. floating stageC. reed swamp stageD. marsh meadow stage
Answer» Correct Answer - A

Discussion

915.	If the carbon atoms fixed by producers already have passed through three species, the trophic level of the last species would be.a. scavengerb. tertiary producerc. tertiary consumerd. secondary consumer
Answer» c. tertiary consumer

Discussion

916.	Which of the following type of ecosystem is expected in an area where evaporation exceeds precipitation, and mean annual rainfall is below 100mm(a) Grassland(b) Shrubby forest(c) Desert(d) Mangrove
Answer» The correct answer is (c) Desert

Discussion

917.	The zone at the edge of a lake or ocean which is alternatively exposed to air and immersed in water is called:a. Pelagic zoneb. Benthic zonec. Lentic oned. Littoral zone
Answer» d. Littoral zone

Discussion

918.	Edaphic factor refers to:a. Waterb. Soilc. Relative humidityd. Altitude
Answer» b. Edaphic factor refers to Soil.

Discussion

919.	Which of the following is an ecosystem service provided by a natural ecosystem?a. Cycling of nutrientsb. Prevention of soil erosionc. Pollutant absorption and reduction of the threat of global warmingd. All of the above
Answer» d. All of the above

Discussion

920.	Which of the following is a correct trend of succession in hydroseric succession ?A. Rooted submerged `to` Phytoplankton `to` Reed swap `to` Sedge meadowB. Phytoplankton `to` Reed swamp `to` Rooted submerged `to` Sedge meadowC. Phytoplankton `to` Sedge medow `to` Reed Swamp `to` Root submergedD. Phytoplankton `to` Rooted submerged `to` Reed swamp `to` Sedge meadow
Answer» Correct Answer - D Hydroseric succession starts in the water bodies, which are newly formed. The sequence would be phytoplanktons `to` rooted submerged plants `to` reed swamp and finally sedge meadow.

Discussion

921.	If 30 J of energy is trapped at producers level, than now much energy will be available to peacock as food in the following chain ? Plant `to` Mice `to` Snake `to` PeacockA. 0.3 JB. 0.03 JC. 0.0003 JD. 0.003 J
Answer» Correct Answer - B According to `10%` law energy flow by Raymond Lindeman (1942) the total amount of energy that can be transferred to the next trophic level is on,y `01%`. Hence, peacock will receive 0.03 J of energy as top consumer. Energy received by the organisms at different trophic level can be seen as follows Plant `to 30J` Mice `to30xx10%=3J` Snake `to3xx10%=0.3J` Peacock `to0.3xx10%=0.03J`

Discussion

922.	Total amount of energy trapped by green plants in food is called:-A. Gross primary productionB. Net primary productionC. Standing cropD. Standing state
Answer» Correct Answer - A

Discussion

923.	Fragmentattion of detritus is done byA. catB. rabbitC. cockroachD. earthworm
Answer» Correct Answer - D

Discussion

924.	Justify the pitcher plant as a producer.
Answer» Pitcher plant is chlorophyllous and is thus capable of photosynthesis and act as producer.

Discussion

925.	Justify the pitcher plant as a producer.
Answer» Pitcher plant (Nepenthes) is an insectivores plant,which is chlorophyllus and capable of trapping solar radiations for chemical energy for photosynthesis. It is nifectivorous plant which are produced in the soil lacking nitrogen thus to make up their nitrogen deficiency they trap insects.

Discussion

926.	Name an omnivore which occurs in both grazing food chain and the decomposer food chain.
Answer» Sparrow/crow.

Discussion

927.	Decomposer areA. autotrophsB. heterotrophsC. reducersD. autoheterotrophs
Answer» Correct Answer - C

Discussion

928.	Name an omnivore which occurs in both grazing food chain and the decomposer food chain.
Answer» Cockroaches and crow are two omnivore, that are present in both grazing 0r predator an detritus food chain.

Discussion

929.	Which of the following processes will be most adversely affected if microorganisms are removed from a forest ecosystem?A. Solar energy fixation and nutrient cyclingB. Carbon assimilation and nitrogen fixationC. Decomposition of organic matter and photosynthesisD. Nitrogen fixation and decomposition of organic matter
Answer» Correct Answer - D

Discussion

930.	Which of the following are called key industry animals?A. AutotrophsB. DecomposersC. HerbivoresD. Top carnivores
Answer» Correct Answer - B

Discussion

931.	Primary productivity is expressed in terms ofA. `(Kcal m^(-2))yr^(-1)`B. `("Kcal" xx "yr")/(m^2)`C. `yr //gm^2`D. `("Kcal")/(m^2)`
Answer» Correct Answer - A

Discussion

932.	Least productive ecosystem isA. desertB. oceanC. landD. coral reef
Answer» Correct Answer - A

Discussion

933.	Most productive ecosystem isA. grasslandB. coral reefsC. seep seaD. arid land
Answer» Correct Answer - B

Discussion

934.	Which of the following ecosystem is least productive ?A. Deep oceansB. Moist forestC. Shallow oceansD. Grasslands
Answer» Correct Answer - A

Discussion

935.	Which of the follwoing ecosystem can be included in least productive category ?A. Coral reefB. DesertC. Tropical rain forestD. Sugarcane field
Answer» Correct Answer - B

Discussion

936.	Least productive ecosystem isA. GrasslandB. SavannahC. ForestD. Tundra
Answer» Correct Answer - C

Discussion

937.	Pond is an example of____ecosystem.A. ArtificialB. NaturalC. ForestD. Grassland
Answer» Correct Answer - B

Discussion

938.	Which of the following is the most productive ecosystem?A. EstuaryB. Open seaC. DesertD. Mountain
Answer» Correct Answer - A

Discussion

939.	The pyramid of energy in a forest ecosystem is:A. Always uprightB. Always invertedC. Both upright and invertedD. None of the above
Answer» Correct Answer - A

Discussion

940.	The pyramid of energy in a forest ecosystem is:A. Always uprightB. Always invertedC. both (a) and (b)D. none of these
Answer» Correct Answer - A

Discussion

941.	How much of the net primary productivity of a terrestrial ecosystem is eaten and digested by herbivores?A. 0.01B. 0.1C. 0.4D. 0.9
Answer» Correct Answer - B Energy flow in the ecosystem follows the ten percent law (put forth by Lindermann in 1942 ). From the level of primary producers onwards, only 10 % of energy is stored at the higher trophic level and 90 % is lost (as heat or in respiration etc. ). This energy transfer forms the basis of life. `underset(20J)"Producers" to underset(2 J)"Herbivores" to underset(0.2J)"Carnivores"`

Discussion

942.	Among the following, where do you think the process of decomposition would be the fastest?A. Tropical rain forestB. AntarcticC. Dry arid regionD. Alpine region
Answer» Correct Answer - A

Discussion

943.	Among the following where do you think the process of decomposition would be the fastest?A. Tropical rain forestB. AntarcticC. Dry arid regionD. Alphine region
Answer» Correct Answer - a The lowest strata/storey/forest floor of the tropical rain forest recieve little solar radiation and soil is rich in mineral and humus. As the high temperature and moisture (humidity) are favourable for high microbial activity of decomposers to decompos the fallen leaves and dead organic matter, process of decomposition is fastest in this type of biome.

Discussion

944.	Among the following where do you think the process of decomposition would be the fastest?A. Tropical rainforestB. AntarcticC. Dry and regodD. Alpine region
Answer» Correct Answer - A Tropical rainforests have the optimum conditions of moisture and temperature. Consequently, the rate of decomposition in tropical rain forests is also high.

Discussion

945.	Pyramid of number for forest ecosystem isA. uprightB. invertedC. spindle - shapedD. Both (a) and (b)
Answer» Correct Answer - A

Discussion

946.	Among the following , where do you think the process of decomposition would be the fastest ?A. Tropical rain forestB. AntarcticC. Dry and regionD. Alpine region
Answer» Correct Answer - A In tropical rain forest, there is more rainfall and more temperature that favours decomposition.

Discussion

947.	Detritus food chain begins with theA. Dead organic matterB. DetritusC. Death of an organismD. All of the above
Answer» Correct Answer - D Detritus food chain begins with the dead organic matter ro detritus or deatth of organism

Discussion

948.	Sun is the only source of energy for all the ecosystems on Earth , exceptA. Some shallow South American lakesB. Rocky sea coast of ScotlandC. Deep sea hydro-thermal ecosystemsD. All of the above
Answer» Correct Answer - C Sun is the only source of energy for all the ecosystems on Earth, except deep sea hydro-thermal ecosystem.

Discussion

949.	Of the incident solar radiation PAR isA. ` lt 50%`B. `gt 50%`C. `2-10 %`D. `1-5%`
Answer» Correct Answer - A Of the incident solar radiation PAR is `lt 50%`

Discussion

950.	Largest ecosystems in the world are:A. forestsB. riversC. oceansD. grasslands
Answer» Correct Answer - C

Discussion

Explore topic-wise InterviewSolutions in .

Choose the incorrect statements. I. Plant absorbed phosphates in the form of `H_(2)PO_(4)^(-)`. II. Reservior of phosphorus in atmosphere. III. Most of the phosphates deposited in deep ocean as sediments. IV. Plant absorbed organic phosphates.A. II and IVB. II and IIIC. I and IVD. I and III

Phosphates remain outside the natural cycle for a long timeA. When they form compounds with metalsB. When they are incorporated in bones and teethC. When the bodies of the organisms excrete and decomposeD. Both (1) and (2)

Which of the following ecosystem has very little primary productivity?A. RiverB. EstuaryC. LakeD. Marsh

Which ecosystem has the maximum biomass ?A. Forest ecosystemB. Grassland ecosystemC. Pond ecosystemD. Lake ecosystem

Phosphates remain outside the natural cycle for a long timeA. When they from compounds with metalsB. When they are incorported in bone and teethC. When the bodies of the organisms excrete and decomposeD. Both (1) & (2)

Chief producers in the oceasns areA. DinoflagellatesB. DiatomsC. CyanobacteriaD. Euglenoids

In an ecosystem, which one shows one-way passageA. free energyB. carbonC. nitrogenD. potassium

Atmospheric input is negligible inA. Carbon cycleB. Phosphorus cycleC. Oxygen cycleD. Nitrogen cycle

Consider the following statements about carbon cycle and choose how many statments are correct ?A. TwoB. ThreeC. FourD. Five

Identify the plant belonging to the reed-swamp stage in hydrosere successionA. JuncusB. SagittariaC. SalixD. Trapa

In the hydrosere the reed - swamp stage is followed byA. Marsh -meadow stageB. Submerged free floating plant stageC. Submerged plant, stageD. Phytoplankton

Which one occurs at same trophic levelA. Crow and cowB. Snake and earthwormC. Tiger and rabbitD. Deer and bees

Hydrosere start with which stageA. submerged stageB. reed swamp stageC. plankton stageD. sedge meadow stage

Hydrilla and Utricularia are found inA. submerged stageB. floating stageC. reed swamp stageD. marsh meadow stage

If the carbon atoms fixed by producers already have passed through three species, the trophic level of the last species would be.a. scavengerb. tertiary producerc. tertiary consumerd. secondary consumer

Which of the following type of ecosystem is expected in an area where evaporation exceeds precipitation, and mean annual rainfall is below 100mm(a) Grassland(b) Shrubby forest(c) Desert(d) Mangrove

The zone at the edge of a lake or ocean which is alternatively exposed to air and immersed in water is called:a. Pelagic zoneb. Benthic zonec. Lentic oned. Littoral zone

Edaphic factor refers to:a. Waterb. Soilc. Relative humidityd. Altitude

Which of the following is an ecosystem service provided by a natural ecosystem?a. Cycling of nutrientsb. Prevention of soil erosionc. Pollutant absorption and reduction of the threat of global warmingd. All of the above

If 30 J of energy is trapped at producers level, than now much energy will be available to peacock as food in the following chain ? Plant `to` Mice `to` Snake `to` PeacockA. 0.3 JB. 0.03 JC. 0.0003 JD. 0.003 J

Total amount of energy trapped by green plants in food is called:-A. Gross primary productionB. Net primary productionC. Standing cropD. Standing state

Fragmentattion of detritus is done byA. catB. rabbitC. cockroachD. earthworm

Justify the pitcher plant as a producer.

Justify the pitcher plant as a producer.

Name an omnivore which occurs in both grazing food chain and the decomposer food chain.

Decomposer areA. autotrophsB. heterotrophsC. reducersD. autoheterotrophs

Name an omnivore which occurs in both grazing food chain and the decomposer food chain.

Which of the following are called key industry animals?A. AutotrophsB. DecomposersC. HerbivoresD. Top carnivores

Primary productivity is expressed in terms ofA. `(Kcal m^(-2))yr^(-1)`B. `("Kcal" xx "yr")/(m^2)`C. `yr //gm^2`D. `("Kcal")/(m^2)`

Least productive ecosystem isA. desertB. oceanC. landD. coral reef

Most productive ecosystem isA. grasslandB. coral reefsC. seep seaD. arid land

Which of the following ecosystem is least productive ?A. Deep oceansB. Moist forestC. Shallow oceansD. Grasslands

Which of the follwoing ecosystem can be included in least productive category ?A. Coral reefB. DesertC. Tropical rain forestD. Sugarcane field

Least productive ecosystem isA. GrasslandB. SavannahC. ForestD. Tundra

Pond is an example of____ecosystem.A. ArtificialB. NaturalC. ForestD. Grassland

Which of the following is the most productive ecosystem?A. EstuaryB. Open seaC. DesertD. Mountain

The pyramid of energy in a forest ecosystem is:A. Always uprightB. Always invertedC. Both upright and invertedD. None of the above

The pyramid of energy in a forest ecosystem is:A. Always uprightB. Always invertedC. both (a) and (b)D. none of these

How much of the net primary productivity of a terrestrial ecosystem is eaten and digested by herbivores?A. 0.01B. 0.1C. 0.4D. 0.9

Among the following, where do you think the process of decomposition would be the fastest?A. Tropical rain forestB. AntarcticC. Dry arid regionD. Alpine region

Among the following where do you think the process of decomposition would be the fastest?A. Tropical rain forestB. AntarcticC. Dry arid regionD. Alphine region

Among the following where do you think the process of decomposition would be the fastest?A. Tropical rainforestB. AntarcticC. Dry and regodD. Alpine region

Pyramid of number for forest ecosystem isA. uprightB. invertedC. spindle - shapedD. Both (a) and (b)

Among the following , where do you think the process of decomposition would be the fastest ?A. Tropical rain forestB. AntarcticC. Dry and regionD. Alpine region

Detritus food chain begins with theA. Dead organic matterB. DetritusC. Death of an organismD. All of the above

Sun is the only source of energy for all the ecosystems on Earth , exceptA. Some shallow South American lakesB. Rocky sea coast of ScotlandC. Deep sea hydro-thermal ecosystemsD. All of the above

Of the incident solar radiation PAR isA. ` lt 50%`B. `gt 50%`C. `2-10 %`D. `1-5%`

Largest ecosystems in the world are:A. forestsB. riversC. oceansD. grasslands