Ecosystem MCQs | Ecosystem Objective Type Questions and Answers

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Questions
1 It helps in absorbtion of phosphorous?
A Leaves
B Mycorriza
C Root
D Stem

Answer:Mycorriza
2 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:40,000
3 What percentage of total metabolic energy is produced through fermentation of lactic acid?
A 80%
B 70%
C 100%
D 40%

Answer: 70%
4 Which adaptation is observe only in xerophytes ?
A CAM
B Hatch-Slack
C TCA
D C3 cycle

Answer:CAM
5 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: During night
6 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 trophic level amount of stored energy reduces.
A (I) and(II)
B (III) and (iv)
C (i) and (iv)
D All of the given

Answer:All of the given
7 Food chain always start with producer, which of the following is an exceptional to the given statement.
A Rat
B Fox
C Lion
D Earth – worm

Answer:Earth – worm
8 X is released in Halophytes and Y is source of it, Z process occurs in- estuary, then What does x,y,z indicate?
A Potassium Y - rocks Z- Biological magnification
B X - DDT Y - Water
C Y- Biological magnification
D None of this

Answer:Y- Biological magnification
9 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: It is essential for all the organisms
10 What does pyramid of Biomass 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 trophic level
D All of the given

Answer: Organisation of tissue of each trophic level
11 Which option is correct for the given information ?
Ecosystem is an outcome of an interaction between all living components and non- living components of Environment.
GPP= NPP- loss due to respiration
Primary productivity is measured in dry biomass.
A TFT
B FFT
C FTF
D TTF

Answer: TTF
12 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 Related birth rate

Answer: Carrying Capacity of Population
13 At which vital index population is stable ?
A 1
B 0
C Infinitive
D 100

Answer: 100
14 In any of the ecosystem man can be
A Primary Consumer Consumer
B Secondary
C Producer
D a & c

Answer: a & c
15 If earth is considered a unit region then biosphere can be compared to
A Eco-System
B Population
C Biotic Community
D Species

Answer:Biotic Community
16 If earth is considered a unit region then it can be compared to
A Eco-System
B Population
C Biotic Community
D Species

Answer: Eco-System
17 Who accepts the nutrient released in environment by decomposer ?
A Consumers
B Producers
C Secondary Consumers
D None of the given

Answer:Producers
18 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: can not be predicted
19 Which organism provided useable phosphate from dead organisms?
A Fungi, Bacteria
B Fungi , Algae
C Bacteria, Algae
D Bacteria, Fungi

Answer: Bacteria, Fungi
20 What is an Original Source of energy flow in any food chain?
A Sun
B Produces
C Primary
D None

Answer: Produces

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