Chapter: Ecosystem
1.

What does following diagram indicate ?

A. Declining Population
B. Constant declining Population
C. Increasing Population
D. Stable Population
Answer» C. Increasing Population
2.

Which option is not correct for the given diagram ?

A. It indicate decreasing population stable
B. It indicate stable population
C. The post-population age group people are more in number
D. The death rate is higher than birth rate
Answer» B. It indicate stable population
3.

A Snake feed on frog, the hawk feed on this snake. What is the place of snake in foodchain?

A. producer
B. primary consumer
C. secondary consumer
D. Tertiary consumer
Answer» C. secondary consumer
4.

What is correct for the given diagram?

A. Pre- re productire group people are more in number
B. Post-re productive group people are more in number
C. Post-re productive group people are more less
D. In it-pre productive and post reproductive age- group are placed respectively.
Answer» A. Pre- re productire group people are more in number
5.

Orchid living on the tree is an example of ..............?

A. Parasitic
B. Predetor
C. Commensalism
D. Mutualism
Answer» C. Commensalism
6.

Population of which of the following will be highest in the foodchain?

A. Decomposer
B. Primary Producer
C. Photosynthetic organism
D. Secondary consumers
Answer» C. Photosynthetic organism
7.

System resulting from interaction of all the known living factors and populaton of all the species of a unit area is...

A. Ecology
B. Genetics
C. Science of plants and animal
D. Ecosystem
Answer» D. Ecosystem
8.

Which of the following is the correct statement for food chain?

A. Every chain formed by nutritional relations , is used to understand energy flow.
B. Enery componet of the food chain forms trophic level.
C. Inter- relation amongest different food chain froms food web.
D. All of the given
Answer» D. All of the given
9.

Which of the following uses maximum energy?

A. Primary comsumer
B. Secondary consumer
C. Decomposer
D. Primary Producers
Answer» D. Primary Producers
10.

Through, whoch of the following, enery enters in an ecosyslem?

A. Herbivore
B. Producer
C. Decomposer
D. Primary producers
Answer» B. Producer
11.

Why is algae placed in first place of food chain ?

A. Algae is first to synthesize food.
B. Algae is first to consume food.
C. Every living organisam can utilize fo
Answer» A. Algae is first to synthesize food.
12.

In which of the following wheat eating pegions included ?

A. Decomposer
B. Primary consumer.
C. primary producers
D. secondary consumer.
Answer» B. Primary consumer.
13.

which of the following is placed in upper most (highest) level of ecological pyramids.

A. Herbivore
B. Carnivors
C. Primary and Secondary Producers.
D. Primary and Secondary consumer.
Answer» B. Carnivors
14.

As we proceed in food chain, bio-mass.....

A. Remain Same
B. Decreases
C. Increases
D. Initially same and later keep decreasing.
Answer» B. Decreases
15.

In ecosystem the source of energy is....

A. ATP
B. Sun
C. The Green plant
D. Sugar.
Answer» C. The Green plant
16.

Who is primary consumer of biotic community ?

A. Herbivores/ Grazing animal
B. Omnivores
C. Scavengers
D. Carnivores.
Answer» A. Herbivores/ Grazing animal
17.

In which of the following weeds are placed ?

A. Primary producer
B. Secondary consumer.
C. Primary consumer.
D. Decomposer.
Answer» A. Primary producer
18.

When does the energy flow start in an ecosystem ?

A. When material cycle starts
B. When sun rises
C. When any living organisam gain fo
Answer» B. When sun rises
19.

which of the following option is correct for storage place phosphorus and nitrogen respectively ?

A. Consumer
B. Parental rock and environment
C. Environment and producers
D. Environment and parental rock
Answer» B. Parental rock and environment
20.

An individual ''x'' uses mashroom as food then in which trophic level mashroom and''x'' are included? Mashroom X Foodchain

A. Secondary Primary  Detritivorous food chain
B. Primary Secondary Detritivorous food chain
C. Primary Secondary  Grazing food chain
D. Secondary Primary  Grazing food chain
Answer» B. Primary Secondary Detritivorous food chain
21.

Which of the following is trophic level of the orchid staying on mango tree ?

A. First
B. Tertiary/ Third
C. Second
D. Fourth
Answer» A. First
22.

It is correct for ecosystem.......

A. ( Plants, Animals, Microorganisms) + Abiotic environment
B. Community formed by various species present in a particular region.
C. Animal, plants and micro- organisms.
D. Abiotic factors
Answer» A. ( Plants, Animals, Microorganisms) + Abiotic environment
23.

What is the original source of energy for the living organisms ?

A. Carbohydrate
B. Sun light
C. ATP
D. Lipid
Answer» B. Sun light
24.

In which of the following curd eating people are included ?

A. Producer
B. First ]1[s
C. Tertory 3[ ]rd
D. Second 2[ ]nd
Answer» A. Producer
25.

The functional efficiency of ecosystem is effected when decomposers are removed from it, because..

A. Energy flow will stop
B. Rest components decomposetion will become faster
C. Herbivous will not get sun light
D. Flow of nutrient will stop.
Answer» D. Flow of nutrient will stop.
26.

From which of the following detritus food chain will start ?

A. Algae
B. Bacteria
C. Protozoa
D. Virus
Answer» B. Bacteria
27.

At Each trophic level, in which form energy is lost ?

A. Heat
B. Chemical
C. Light
D. None
Answer» A. Heat
28.

Which Source of eutrophication is the modern source of phosphorus ?

A. Detergent
B. Fertilizer
C. Faecal of animal
D. Rivers
Answer» A. Detergent
29.

It helps in absorbtion of phosphorous ?

A. Leave
B. Mycorriza
C. Root
D. Stem
Answer» B. Mycorriza
30.

In a day, How many times an individual inspire and expire (breathing) ?

A. 10,000
B. 20,000
C. 40,000
D. 50,000
Answer» C. 40,000
31.

What percentage of total metabolic energy is produced through fermentation of lactic acid ?

A. 80%
B. 70%
C. 100%
D. 40%
Answer» B. 70%
32.

Which of the following opteon is correct for CO2 absorption in CAM ?

A. During night
B. Only at midnight
C. During day time
D. Morning
Answer» A. During night
33.

Few statements are given below in reference with Thermodynamics, Which of the following option shows all correct statements for it ?
(I) Amount of energy is constant.
(II) During transfer of energy some amount of energy is converted in to heat.
(III) Free energy = energy which can do work.
(IV) At each tophic level amount of stored energy reduces.

A. (I) and(II)
B. (III) and (iv)
C. (i) and (iv)
D. All of the given
Answer» D. All of the given
34.

X is released in Halophytes and Y is source of it, , Z process occurs in- estuary, then What does x,y,z indicate?

A. X- Potassium Y - rocks Z- Biological magnification
B. X - DDT Y - Water Y- Biological magnification
C. X -Phosphorus Y - Sewage water Z- Eutophication
D. None of this.
Answer» C. X -Phosphorus Y - Sewage water Z- Eutophication
35.

If energy produced by producer is 1000 units, than What amount of energy will be found in highest level of consumer ?

A. 100
B. 10
C. 1
D. 1000
Answer» C. 1
36.

What does given chart indicate ?

A. Structure of ecosystem.
B. Type of ecosystem
C. First and second law of Thermodynamics
D. - Bidirerectional flow of energy.
Answer» C. First and second law of Thermodynamics
37.

What is incorrect for oxygen ?

A. Most of the metabolic energy is produced by it.
B. Plants are included in the organisms producing it.
C. It is essential for all the organisms.
D. Its proportion in water is 90%.
Answer» C. It is essential for all the organisms.
38.

X is source of y. but y never return to x, Than which option is wrong for x and y.

A. X = plant, Y= organic compound
B. X= sun, Y=Energy
C. a & b Both are correct.
D. A and B are Wrong.
Answer» D. A and B are Wrong.
39.

What does pyramid of Bimass of an ecosystem indicate in....

A. Number of species in each trophic level
B. Number of organisms in each trophic level
C. Organisation of tissue of each tophic level
D. All of the given.
Answer» C. Organisation of tissue of each tophic level
40.

Which option is correct for the given information ?
(1) Ecosystem is an outcome of an interaction between all living components and non- living components of Environment.
(2) GPP= NPP- loss due to respiration
(3) Primary productivity is measured in dry biomass.

A. TFT
B. FFT
C. FTF
D. TTF.
Answer» D. TTF.
41.

In one forest maximum 500 lions can be allowed with than what does 500 indicate ?

A. Maximum birth rate
B. Population of lion
C. Carrying Capacity of Population
D. Realed birth rate
Answer» C. Carrying Capacity of Population
42.

At which vital index population is stable ?

A. 1
B. 0
C. Infinitive
D. 100
Answer» D. 100
43.

If earth is considered a unit region then it can be compared to....

A. Eco-System
B. Population
C. Biotic Community
D. Species
Answer» A. Eco-System
44.

Who accepts the nutrient released in environment by docomposer ?

A. Consumer
B. Producers
C. Secondary Consumers
D. None of the given
Answer» B. Producers
45.

If herbivores are "5" in number in the given food chain then, what will be the total number of trophic layers in the it ?

A. 7
B. 8
C. 5
D. can not be predicted
Answer» D. can not be predicted
46.

which organism provided useable phosphate from dead organisms?

A. Fungi, Bacteria
B. Fungi , Algae
C. Bacteria, Algae
D. Bacteria, Fungi
Answer» D. Bacteria, Fungi
47.

How many times do we breathe per day ?

A. 20,000
B. 40,000
C. 20,000
D. None of theme
Answer» A. 20,000
48.

It is first stem of the decomposition of organic compound.

A. Fragmentation - In body of Scavengers
B. Catabolism - In body of decomposer
C. Leaching - In soil
D. Catabolism - In soil
Answer» A. Fragmentation - In body of Scavengers
49.

Autotrophs use [X] and Produces [Y], which is store as [Z], which of the given option is correct for X, Y, and Z ? X Y Z

A. Sunlight Nutrient Chemical
B. Energy Chemical energy Sunlight
C. Grass (Herb) Energy Starch
D. Sunlight Glycogen ATP
Answer» A. Sunlight Nutrient Chemical
50.

What is an Original Source of energy flow in any food chian ?

A. Sun
B. Produces
C. Primary
D. None
Answer» B. Produces

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