NEET Biology Ecosystem MCQs Set C

Question: Which age group in pyramid indicate less reproductive potential ?

• a) Triangular
• b) Bell shaped
• c) Inverted Bell shaped
• d) All of them have equal( same) potential

Answer: Triangular

Question: 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: ( Plants, Animals, Microorganisms) + Abiotic environment

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

• a) Sun light
• b) Lipid
• c) Carbohydrate
• d) ATP

Answer: Sun light

Question: In which of the following curd eating people are included ?

• a) Producer
• b) First[1st ]
• c) Second[2nd ]
• d) Tertory[3rd ]

Answer: Producer

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

• a) Flow of nutrient will stop
• b) Herbivous will not get sun light
• c) Rest components decomposetion will become faster
• d) Energy flow will stop

Answer: Flow of nutrient will stop

Question: From which of the following detritus food chain will start

• a) Bacteria
• b) Virus
• c) Protozoa
• d) Algae

Answer: Bacteria

Question: Which of the following is gaseous cycle ?

(1) Sulphur cycle (3) Phosphorous cycle

(2) Carbon cycle (4) Nitrogen cycle

• a) 3, 4
• b) 1,3,4
• c) 1,2
• d) 1

Answer: 3, 4

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

• a) HeatNone
• b) None
• c) Light
• d) Chemical

Answer: HeatNone

Question: Which Source of eutrophication is the modern source of phosphorus ?

• a) Detergent
• b) Faecal of animal
• c) Fertilizer
• d) Rivers

Answer: Detergent

Question: It helps in absorbtion of phosphorous ?

• a) Mycorriza
• b) Stem
• c) Leaves
• d) Root

Answer: Mycorriza

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

• a) 40,000
• b) 10,000
• c) 20,000
• d) 50,000

Answer: 40,000

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

• a) 70%
• b) 40%
• c) 80%
• d) 100%

Answer: 70%

Question: Which adaptation is observe only in xerophytes ?

• a) CAM
• b) TCA
• c) Hatch-Slack
• d) C₃ cycle

Answer: CAM

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

• a) During night
• b) During day time
• c) Only at midnight
• d) Morning

Answer: During night

Question: Few statements are given below in reference with Thermodynamics, Which of the following optionshows 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) All of the given
• b) (i) and (iv)
• c) (III) and (iv)
• d) (I) and(II)

Answer: All of the given

Question: Food chain always start with producer, which of the following is an exceptional to the given statement.

• a) Earth - worm
• b) Fox
• c) Rat
• d) Lion

Answer: Earth - worm

Question: 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 -Phosphorus Y - Sewage water

  Z- Eutophication

• b)

  X - DDT Y - Water

  Y- Biological magnification

• c)

  X- Potassium Y - rocks

  Z- Biological magnification

• d) None of this

Answer: 

X -Phosphorus Y - Sewage water

Z- Eutophication

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

• a) 1
• b) 100
• c) 1000
• d) 10

Answer: 1

Question: What is incorrect for oxygen ?

• a) It is essential for all the organisms
• b) Plants are included in the organisms producing it
• c) Most of the metabolic energy is produced by it
• d) Its proportion in water is 90%.

Answer: It is essential for all the organisms

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

• a) A and B are Wrong
• b) X= sun, Y=Energy
• c) X = plant, Y= organic compound
• d) None of this

Answer: A and B are Wrong

Question: What does pyramid of Bimass of an ecosystem indicate in

• a) Organisation of tissue of each tophic level
• b) All of the given
• c) Number of organisms in each trophic level
• d) Number of species in each trophic level

Answer: Organisation of tissue of each tophic level

Question: 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) TTF
• b) FFT
• c) TFT
• d) FTF

Answer: TTF

Question: What is responsible for change in the size of population of any particular area ?

• a) All three
• b) Pressure
• c) Availability of food.
• d) Predation

Answer: All three

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

• a) Carrying Capacity of Population
• b) Maximum birth rate
• c) Population of lion
• d) Realed birth rate

Answer: Carrying Capacity of Population

Question: At which vital index population is stable ?

• a) 100
• b) 0
• c) Infinitive
• d) 1

Answer: 100

Question: In any of the ecosystem man can be

• a) Both
• b) Secondary Consumer
• c) Primary Consumer
• d) None of this

Answer: Both

Question: If earth is considered a unit region then biosphere can be compared to

• a) Population
• b) Species
• c) Biotic Community
• d) Eco-System

Answer: Population

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

• a) Eco-System
• b) Biotic Community
• c) Population
• d) Species

Answer: Eco-System

Question: Who accepts the nutrient released in environment by docomposer ?

• a) Producers
• b) Consumers
• c) Secondary Consumers
• d) None of the given

Answer: Producers

Question: 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) can not be predicted
• b) 8
• c) 7
• d) 5

Answer: can not be predicted

Question: which organism provided useable phosphate from dead organisms?

• a) Bacteria, Fungi
• b) Fungi , Algae
• c) Fungi, Bacteria
• d) Bacteria, Algae

Answer:  Bacteria, Fungi

Question: How many times do we breathe per day ?

• a) 20,000
• b) 40,000
• c) Both
• d) None of theme

Answer: 20,000

Question: 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:  Fragmentation - In body of Scavengers

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

• a) X Y Z-Sunlight Nutrient Chemical
• b) X Y Z-Energy Chemical energy Sunlight
• c) X Y Z-Grass (Herb) Energy Starch
• d) X Y Z-Sunlight Glycogen ATP

Answer: X Y Z-Sunlight Nutrient Chemical

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

• a) Produces
• b) Sun
• c) Primary
• d) None

Answer: Produces 

Question: Immature fall of floral bud and fruits are observed in a farm, and on leaves Red and purple pigments spots are observed, In which of following place is Such Symptoms will not be observed in plants

• a) Foot hills of mountain
• b) Sea shore
• c) Bank of river
• d) Red Soil

Answer: Foot hills of mountain

Question: which of the following eco-system has highest annual primary productivity ?

• a) Tropical Rain forest
• b) Tropical deciduou forest
• c) Temperate deciduou forest
• d) Temperate Ever green forest

Answer: Tropical Rain forest

Question: Which of the following is not a functional unit of ecosystem ?

• a) Stratification
• b) Decompos
• c) Flow of energy
• d) productivity.

Answer: Stratification

Question: Which of the following associations do not establish functional interspeciific association ?

• a) Commensalism
• b) Exosparasite
• c) Mutualism
• d) Endoparasite

Answer: Commensalism

Question: Which statement is correct ?

• a) In all CO₂ acceptor plants, organic compounds are produce throudh photosynthesis
• b) Biomass of the plant is available to only herbivores
• c) Plant uses CO₂ during respiration
• d) All three

Answer:  In all CO₂ acceptor plants, organic compounds are produce throudh photosynthesis

Question: It is the type of photosynthesis occurs in most of the plants ?

• a) C₃ - Cycle
• b) C₂ -Cycle
• c) CAM - Cycle
• d) C₄ - Cycle

Answer: C₃ - Cycle

Question: In an ecosystem, Which of the following is unidirectional ?

• a) Free energy
• b) Organic nutrient
• c) Sulphar
• d) carbon

Answer: Free energy

Question: Who is first to receive Phosphate released through leaching in phosphate cycle ?

• a) producer
• b) Decomposer
• c) Consumer
• d) None of the given

Answer: producer

Question: Which of the following is not a pair of Gaseous cycle ?

• a) N & S
• b) P&N
• c) N & S
• d) C & P

Answer: N & S

Question: What is indicated by Pyramid of number ?

• a) Number of individuals at every trophic layer
• b) Species belonging to a particular region
• c) Number of member of biotic- community
• d) None of the given.

Answer: Number of individuals at every trophic layer

Question: Which of the following has maximun importance (value) in grass- land.

• a) Total Production
• b) Net Production
• c) Secondary Production
• d) Tetiacry Prroduction

Answer: Total Production

Question: Select correct statements

(i) If 90% of Carnivores are remooved form forest, then forest area increases.

(ii) Generally 3 to 4 trophic layer are present in food chain due to loss of energy.

(iii) Food chain always possesses 2 to 8 trophic layers.

(iv) On removing 80% of tigers, member of herbivores will increase.

• a) (ii), (iv)
• b) (i), (iii)
• c) (i), (ii)
• d) (iii), (iv)

Answer: (ii), (iv)

Question: In which stage of the Decomposition, larger surface area for future decomposition is availabel?

• a) 1st
• b) 2nd
• c) 3rd
• d) All of the above

Answer: 1st

Question: which of the following is one of the causes of cancer ?

• a) Inadcquale of O₂ supply
• b) Hypertension
• c) Artheros cerosis
• d) Obesity

Answer: Inadcquale of O₂ supply

Question: which of the given option is shows more stable ecosystem ?

• a) 

  Producer primary Secondary Tertiary Total 

       900      500         225        40      1665

• b)

  Producer primary Secondary Tertiary Total 

      100       200        150            80    530

• c) Both
• d) None of this

Answer: 

Producer primary Secondary Tertiary Total 

     900      500         225        40      1665

Question: which option is more suitable for x and y ?

X : Animal cells possesses mitochondria.

Y : IN animal cell energy is released when carbohydrates are completely broken

• a) If x is correct then only y is correct .
• b) Both are wrong
• c) Both are correct
• d) X : correct Y : wrong

Answer: If x is correct then only y is correct .

Question: Which of the following stage is possible by the activity of Hetorotrophs ?

• a) All the given
• b) Re-accommodation
• c) Utility
• d) Decmposition

Answer: All the given

Question: The herbaceohs plant has 100 gram weight then what would be the average bio-mass of the same ?

• a) 10-15 gram
• b) 85-90 gram
• c) 20-25 gram
• d) 100 gram

Answer: 10-15 gram

Question: X is structaral unit of economy and y is structra unit of x then ... what is the x and the y ?

• a)

        X                                      Y

  Biotic community - Biomass, Abiotic factor

• b)

        X                                      Y

  Biotic community - Biomass, Abiotic factor

• c) Both
• d) None of this

Answer:

      X                                      Y

Biotic community - Biomass, Abiotic factor

Question:  X is maintained by man, but it is harmful to y ,the x and y are (?)

• a)

              X                           Y

  Man made ecosystem - Natural eco-system

• b)

              X                           Y

  Natural eco-system - Man made ecosystem

• c) Both
• d) None of this

Answer:

            X                           Y

Man made ecosystem - Natural eco-system

Question: In material cycle which of the following is last acceptor of material

• a) Is not possing
• b) Decomposer
• c) Producer
• d) Consumer

Answer: Is not possing

Question: Which one is the maximum suitable to from top of the energy pyraimd ?

• a) Therdary consumer
• b) Producers
• c) Secondary consumer
• d) None of this

Answer: Therdary consumer

Question: X is included in environmental factors; y is included in ediphic ( soil related) then the x & y is....

• a)

              X                           Y

             Wind                       Air

• b)

              X                           Y

           Soil                      Light

• c) Both
• d) None of this

Answer:

            X                           Y

           Wind                       Air

Question: Which of the following option is correct for the column I and II ?

Column - I               Column - II

(P) Grass               (i) Decomposer

(Q) Herbivors        (ii) Secondary carniveres

(R) Frog               (iii) producer

(S) Hawk             (iv) primary consumer

                        (v) primary carniveres

• a) (P-ii) (Q-iv) (R-v) (S-ii)
• b) (P-i) (Q-iii) (R-iv) (S-v)
• c) (P-iii) (Q-i) (R-v) (S-iv)
• d) (P-iii) (Q-v) (R-iv) (S-ii)

Answer: (P-ii) (Q-iv) (R-v) (S-ii)

Question: Which component are basic in maintaining body processes?

• a) All of this
• b) Water
• c) Carbohydrate
• d) Energy

Answer: All of this

Question: What is mycorhizer ?

• a) Root + Fungi = Symbioti
• b) fungi +Root = Parasitism
• c) Fungi +leaf = Parasitism
• d) Root+ bacteria = Symbiotic

Answer: Root + Fungi = Symbioti

Question:  It is key- compound for all living organism ?

• a) Phosphures
• b) Calcium
• c) Nitrogen
• d) Sulphar

Answer: Phosphures

Question: What is obtained by the activity of decomposer for the prodneers ?

• a) Carbohydrate
• b) Nutrient
• c) Food
• d) Energy

Answer: Carbohydrate

Question: It 1 lac living organisms are included in third throphie lavel than what would be the number of producers ?

• a) 1crore (millian)
• b) 10 thousand
• c) 1 thousand
• d) 10 lac

Answer: 1crore (millian)

Question: In an ecosystem, when organisms can be included in more than one trophic lager ?

• a) Fish
• b) Frog
• c) Phytoplankton
• d) Zooplanktm

Answer: Fish

Question: When organism of aquatic ecosystem is at equvalent trophee level in when cow is included ?

• a) Zooplankton
• b) Nekton
• c) Phytoplakton
• d) Benthos

Answer: Zooplankton

Question: Which of the follows is an in complent Ecosystem ?

• a) Cave
• b) Grass land
• c) Wet land
• d) River

Answer: Cave

Question: What is correct for human ?

• a) Omnivores
• b) Autotrophs
• c) Carnivore
• d) Herbivore

Answer: Omnivores

Question: which type of food chain is represented by following example ?

• a) Detritivorous food chain
• b) Predators food chain.
• c) Decomposer food chain
• d) Grazzing food chain

Answer: Detritivorous food chain

Question: which type of organisms , fungi & Bacteria of forest ecosystem generally called ?

• a) Decomposers
• b) Secondary consumers
• c) Primary consumer
• d) Prodlucers

Answer: Decomposers

Question: what is correct for the artificial ecosystem ?

• a) Biodiversity is less
• b) Biodiversity is High
• c) Ecosystem is can not be form by human
• d) It is more stable than Netural ecosystem

Answer: Biodiversity is less

Question: Which option is not correct for the given diagram ?

• a) It indicate stable population
• b) It indicate decreasing population stable
• c) The post-population age group people are more in number
• d) The death rate is higher than birth rate

Answer: It indicate stable population

Question: 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: Pre- re productire group people are more in number

Question:

• a) Ecosystem
• b) Biotic community
• c) Population
• d) All of the given

Answer: Ecosystem

Question: What can be Explained through following chart ?

(i) Biological magnification concentration of DDT

(ii) Aquatic food web

(iii) Food chain

(iv) DDT is non degrable

(v) One aquatic ecosystem

• a) (i), (iii), (iv)
• b) (iii), (iv), (v)
• c) (i), (ii), (iii)
• d) (ii), (iii), (iv)

Answer:  (i), (iii), (iv)

Question:  With reference to precess of decomposition arrange the following in proper sequence

• a) 1,4,3,2
• b) 1,2,3,4
• c) 3,1,4,2
• d) 1,3,4,2

Answer: 1,4,3,2

Question:  An element which is generally obtain from rocks. From the given information which is correct option for the same

• a)

  (1) dissolve in water,

  (2) used by planktons

  (3) Fishes

  (4) Sea birds

  (5) deposited at the bottom of the sea

• b)

  (1) dissolve in water,

  (2) depositeda at the bottom of the sea

  (3) used by forest

  (4) eaten by fishes

  (5) eaten by sea birds

• c)

  (1) Fishes

  (2) Sea birds

  (3) used by planktons

  (4) Sea birds

  (5) deposited at the bottom of the sea

• d)

  (1) Fishes

  (2) used by planktons

  (3) Fishes

  (4) Sea birds

  (5) None

Answer:

(1) dissolve in water,

(2) used by planktons

(3) Fishes

(4) Sea birds

(5) deposited at the bottom of the sea

Question:

• a) First and second law of Thermodynamics
• b) Bidirerectional flow of energy.
• c) Type of ecosystem
• d) Structure of ecosystem.

Answer: First and second law of Thermodynamics

Question:

• a) x = Exchange Place y = Biotic Community z = Consumer
• b) x= Biotic Community y = Population z = Consumer
• c) x = Exchange Place y = Population z = Mclro Organism
• d) x = Exchange Place y = Consumer z = Population

Answer: x = Exchange Place y = Biotic Community z = Consumer

Question: Which Pyramid is not correct

• a)

  

• b)

  

• c) Both
• d) None of this

Answer:

Question:

• a) Certain Specific bacteria
• b) Certain fungi
• c) Certain algae
• d) All three

Answer: Certain Specific bacteria

Question: In the given pyramid of energy which of the following can be placed in first trophic level ?

• a) Both
• b) plants
• c) Decomposer
• d) None

Answer: Both

Question:

• a)

         X                Y

  The Sun         The earth

• b)

         X                Y

  The earth        The Sun

• c) Both
• d) None of this

Answer:

       X                Y

The Sun         The earth

Question: In the given chart from carnivores to producer energy level gradually.

• a) Increases
• b) Increases
• c) Decreases & increases both are possible
• d) None

Answer: Increases

Question:  Which option is Correct for the given statments x and y ?

X : fungi, showing law level of body organization producer with thick wall.

Y : On availability of favourable condition they producer sporophytic stage.

• a) X and Y are Correct
• b) Y and X are Correct
• c) Y and X are Incorrect
• d) None of this

Answer:  X and Y are Correct