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Free download in PDF Ecosystem Objective Type Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams like NEET, AIIMS, JIPMER etc. These short solved questions or quizzes are provided by Gkseries./p>
(1)
It helps in absorbtion of phosphorous?
[A]
Leaves
[B]
Mycorriza
[C]
Root
[D]
Stem
(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
(3)
What percentage of total metabolic energy is produced through fermentation of lactic acid?
[A]
80%
[B]
70%
[C]
100%
[D]
40%
(4)
Which adaptation is observe only in xerophytes ?
[A]
CAM
[B]
Hatch-Slack
[C]
TCA
[D]
C3 cycle
(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
(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
(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
(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
(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
(14)
In any of the ecosystem man can be
[A]
Primary Consumer Consumer
[B]
Secondary
[C]
Producer
[D]
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
(16)
If earth is considered a unit region then it can be compared to
[A]
Eco-System
[B]
Population
[C]
Biotic Community
[D]
Species
(17)
Who accepts the nutrient released in environment by decomposer ?
[A]
Consumers
[B]
Producers
[C]
Secondary Consumers
[D]
None of the given
(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
(20)
What is an Original Source of energy flow in any food chain?
[A]
Sun
[B]
Produces
[C]
Primary
[D]
None
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