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This set of Biology Multiple Choice Questions & Answers (MCQs) focuses on Ecosystem Set 3

Q1 | 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
  • Sea shore
  • Bank of river
  • Foot hills of mountain
  • Red Soil
Q2 | who is responsible for the process like, Phosphate Containing Organic compound? Phosphate
  • Certain fungi
  • Certain algae
  • Certain Specific bacteria
  • All three
Q3 | which of the following eco-system has highest annual primary productivity ?
  • Tropical deciduou forest
  • Tropical Rain forest
  • Temperate deciduou forest
  • Temperate Ever green forest.
Q4 | Which of the following is not a functional unit of ecosystem ?
  • Stratification
  • Flow of energy
  • Decompos
  • productivity.
Q5 | Which of the following associations do not establish functional interspeciific association ?
  • Mutualism
  • Exosparasite
  • Endoparasite
  • Commensalism
Q6 | Which statement is correct ?
  • Plant uses CO2 during respiration.
  • Biomass of the plant is available to only herbivores.
  • In all CO2 acceptor plants, organic compounds are produce throudh photosynthesis.
  • All three.
Q7 | It is the type of photosynthesis occurs in most of the plants ?
  • C4 - Cycle
  • C3 - Cycle
  • CAM - Cycle
  • C2 -Cycle
Q8 | In which of the following alimentory canal, '' starch ? glucosen'' is prodused ?
  • Producer
  • Ist trophic layer
  • IInd trophic layer
  • All of types
Q9 | In an ecosystem, Which of the following is unidirectional ?
  • Sulphar
  • Organic nutrient
  • carbon
  • Free energy
Q10 | Who is first to receive Phosphate released through leaching in phosphate cycle ?
  • Decomposer
  • producer
  • Consumer
  • None of the given
Q11 | Which of the following is not a pair of Gaseous cycle ?
  • P&N
  • N & S
  • N & S
  • C & P
Q12 | What is indicated by Pyramid of number ?
  • Number of individuals at every trophic layer.
  • Species belonging to a particular region.
  • Number of member of biotic- community
  • None of the given.
Q13 | Which of the following has maximun importance (value) in grass- land.
  • Secondary Production
  • Net Production
  • Tetiacry Prroduction
  • Total Production.
Q14 | Grass ? cow? lion. If productivity of grass is 5000 kg/ Meter/ year. Then What will be theproductivity of lion ? (In general)
  • 500
  • >50
  • 1000 / / .2kg mter year
  • >100
Q15 | In which stage of the Decomposition, larger surface area for future decomposition is availabel?
  • st 1
  • 2nd
  • 3rd
  • All of the above
Q16 | In the given chart from carnivores to producer energy level gradually.
  • Decreases
  • Increases
  • Decreases & increases both are possible
  • None
Q17 | which of the given option is shows more stable ecosystem ? Producer primary Secondary Tertiary Total consumer consumer consumer
  • 100 200 150 80 530
  • 900 500 225 40 1665
  • 200 100 125 75 500
  • All of the given.
Q18 | which of the following is one of the causes of cancer ?
  • Obesity
  • Artheros cerosis
  • Inadcquale of O2 supply
  • Hypertension
Q19 | which option is more suitable for x and y ?_ans_key_X : Animal cells possesses mitochondria._ans_key_Y : IN animal cell energy is released when carbohydrates are completely broken .
  • Both are correct
  • Both are wrong
  • If x is correct then only y is correct .
  • X : correct Y : wrong
Q20 | Which of the following stage is possible by the activity of Hetorotrophs ?
  • Utility
  • Re-accommodation
  • Decmposition
  • All the given
Q21 | The herbaceohs plant has 100 gram whight then what would be the average bio-mass of the same ?
  • 100 gram
  • 20-25 gram
  • 10-15 gram
  • 85-90 gram
Q22 | In the given pyramid of energy which of the following can be placed in first trophic level ?
  • Decomposer
  • plants
  • a & b Both
  • None
Q23 | X is structaral unit of economy and y is structra unit of x then ... what is the x and the y ? X Y
  • Biotic community - Biomass, Abiotic factor
  • Ecosystem - Biomass,Biotic factor
  • Biomass - Ecosystem
  • Food web - Ecosystem
Q24 | X is maintained by man, but it is harmful to y ,the x and y are (?) X Y
  • Natural eco-system - Man made ecosystem
  • Man made ecosystem - Natural eco-system
  • Any one from a & b
  • Noun of these
Q25 | X is included in environmental factors; y is included in ediphic ( soil related) then the x & y is.... X Y
  • Air Water
  • Water Air
  • Soil Light
  • Wind Air