Ecosystem NEET Questions | Online MCQs Test 02 3


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Ecosystem NEET MCQ | Ecosystem Class 12 Questions and Answers | Ecosystem Class 12 MCQ | NEET MCQ ON Ecosystem | Class 12 Ecosystem MCQ | Class 12 Ecosystem Important Questions

Ecosystem Questions: Quiz - 2

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Question 1
The tiny free-swimming animals on the surface of water constitute
A
Phytoplankton
B
Symbionts
C
Benthos
D
Zooplankton
Question 2
The biomass available for consumption by the herbivores and the decomposers is called
A
Gross primary productivity
B
Net primary productivity
C
Secondary productivity
D
Standing crop
Question 3
Transfer of energy in different trophic levels of an ecosystem is called
A
Bioenergetics
B
Biosystem
C
Geobiocoenosis
D
Holocoenotic
Question 4
The species, though insignificant in number, determine the existence of many other species in a given ecosystem. Such species is known as
A
Keystone species
B
Sacred species
C
Endemic species
D
Extinct species
Question 5
Acacia arabica is
A
Hydrophyte
B
Mesophyte
C
Xerophyte
D
None of these
Question 6
The remains of the dead plants and animals is called
A
Detritus
B
Detritivores
C
Humus
D
Litter
Question 7
Consider the following statements concerning food chains: (a) Removal of 80% tigers from an area resulted in greatly increased growth of vegetation (b) Removal of most of the carnivores resulted in an increased population of deer (c) The length of food chains is generally limited to 3 - 4 trophic levels due to energy loss. (d) The length of food chains may vary from 2 to 8 trophic levels. Which two of the above statements are correct?
A
a, b
B
b, c
C
c, d
D
a, d
Question 8
The nature’s cleaners are
A
Producers
B
Consumers
C
Decomposers and scavengers
D
Symbionts
Question 9
DDT residues are rapidly passed through food chain causing biomagnification because DDT is
A
Water soluble
B
Lipo soluble
C
Moderately toxic
D
Non-toxic to aquatic animals
Question 10
The most recently discovered ecosystem is
A
Vents
B
Crater
C
Tundra
D
Floating iceberg
Question 11
Hydrarch succession takes place in
A
Dry areas
B
Wetter areas
C
Bare area
D
None of these
Question 12
The more abundant animals in a desert grassland are
A
Arboreal
B
Diurnal
C
Aquatic
D
Fossorial
Question 13
Gradual and predictable changes in the species composition of a given area is
A
Primary succession
B
Ecological succession
C
Xerarch succession
D
Secondary succession
Question 14
The maximum biomass occurs in
A
Tropical forests
B
Temperate forests
C
Taiga
D
Alpine vegetation
Question 15
Animals living at the bottom of the sea are known as
A
Lentic
B
Pelagic
C
Benthic
D
Lotic
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3 thoughts on “Ecosystem NEET Questions | Online MCQs Test 02

  • rajatgarg

    very good queation paper
    thank you so much

  • vikas

    the mcqss are too good and knowledgeful thanking you
    vikas