CSS Agriculture Questions & Answers - Part-1 - Set 19

1)   The term 'bio-coenosis' was coined by:

a. Tansley
b. Warming
c. Carl Mobius
d. S.C.Pandya
Answer  Explanation 

ANSWER: Carl Mobius

Explanation:
No explanation is available for this question!


2)   Biotic components of an ecosystem include:

a. Producers only
b. Consumers only
c. Producers and Consumers only
d. Producers, consumers and decomposers
Answer  Explanation 

ANSWER: Producers, consumers and decomposers

Explanation:
No explanation is available for this question!


3)   Which is the most stable ecosystem?

a. Mountain
b. Desert
c. Forest
d. Ocean
Answer  Explanation 

ANSWER: Ocean

Explanation:
No explanation is available for this question!


4)   The greatest biomass of autotrophs in the world's oceans is that of:

a. Benthic brown algae, coastal red algae and dephnids
b. Benthic diatoms and marine viruses
c. Sea-grasses and slime-moulds
d. Free-floating microalgae, cyanobacteria and nanoplankton
Answer  Explanation 

ANSWER: Free-floating microalgae, cyanobacteria and nanoplankton

Explanation:
No explanation is available for this question!


5)   Which are the biotic components of forest ecosystem?

a. Producers
b. Decomposers
c. Consumers
d. All of the above
Answer  Explanation 

ANSWER: All of the above

Explanation:
No explanation is available for this question!


6)   Energy enters into the ecosystem through:

a. Herbivores
b. Carnivores
c. Producers
d. Decomposers
Answer  Explanation 

ANSWER: Producers

Explanation:
No explanation is available for this question!


7)   The part of earth in which life exists is known as:

a. Lithosphere
b. Biosphere
c. Atmosphere
d. Hydrosphere
Answer  Explanation 

ANSWER: Biosphere

Explanation:
No explanation is available for this question!


8)   Which ecosystem has the highest primary productivity?

a. Pond ecosystem
b. Lake ecosystem
c. Grassland ecosystem
d. Forest ecosystem
Answer  Explanation 

ANSWER: Forest ecosystem

Explanation:
No explanation is available for this question!


9)   In food chain, herbivores are:

a. Producer
b. Primary consumer
c. Secondary consumers
d. Decomposers
Answer  Explanation 

ANSWER: Primary consumer

Explanation:
No explanation is available for this question!


10)   In an upright pyramid of biomass, the herbivores occupy the position:

a. 4
b. 2
c. 3
d. 1
Answer  Explanation 

ANSWER: 2

Explanation:
No explanation is available for this question!


11)   The flora and fauna in lakes and ponds represents:

a. Lentic biota
b. Lentic biota
c. Abiotic
d. None of these
Answer  Explanation 

ANSWER: Lentic biota

Explanation:
No explanation is available for this question!


12)   Relative biological effectiveness (RBE) is usually referred to damages caused by:

a. Pollution
b. High temperature
c. Low temperature
d. Radiation
Answer  Explanation 

ANSWER: High temperature

Explanation:
No explanation is available for this question!


13)   If phytoplanktons are destroyed from sea, then:

a. Algae will get more grow luxuriantly
b. Primary consumers will grow
c. Food chain will be effected
d. No effect will be seen
Answer  Explanation 

ANSWER: Food chain will be effected

Explanation:
No explanation is available for this question!


14)   When the number of organisms at successive levels are plotted, they assume the space of a pyramid. This is called the pyramid of:

a. Energy
b. Number
c. Biomass
d. Both (a) and (c)
Answer  Explanation 

ANSWER: Number

Explanation:
No explanation is available for this question!


15)   Ten per cent law of energy transfer, in a food chain was enunciated by:

a. Elton
b. Heackel
c. Lindeman
d. Schimper
Answer  Explanation 

ANSWER: Lindeman

Explanation:
No explanation is available for this question!


16)   Which part of the pond ecosystem does not affect by the temperature:

a. Epilimnion
b. Metalimnion
c. Hypolimnion
d. All of the above
Answer  Explanation 

ANSWER: Hypolimnion

Explanation:
No explanation is available for this question!


17)   The rate of storage of food energy at consumer level is called:

a. Secondary productivity
b. Primary productivity
c. Gross productivity
d. Net productivity
Answer  Explanation 

ANSWER: Secondary productivity

Explanation:
No explanation is available for this question!


18)   Which of the following is an artificial ecosystem?

a. Rice-field
b. Forest
c. Grassland
d. Lake
Answer  Explanation 

ANSWER: Rice-field

Explanation:
No explanation is available for this question!


19)   Source of energy in an ecosystem is:

a. Sun
b. ATP
c. Sugar made by plant
d. Green plant
Answer  Explanation 

ANSWER: Sun

Explanation:
No explanation is available for this question!


20)   Savannahs are:

a. Topical rain forest
b. Desert
c. Grassland with scattered trees
d. Dense forect with close canopy
Answer  Explanation 

ANSWER: Grassland with scattered trees

Explanation:
No explanation is available for this question!


21)   Peacock eats a snake and snake eats frog and frog eats insect while insect eats green plant, then position of peacock is:

a. Primary producer
b. Secondary Producer
c. Decomposer
d. Apex of food pyramids
Answer  Explanation 

ANSWER: Apex of food pyramids

Explanation:
No explanation is available for this question!


22)   A food chain has the following trophic levels:

a. 3 or 4
b. 3
c. 2
d. 1
Answer  Explanation 

ANSWER: 3 or 4

Explanation:
No explanation is available for this question!


23)   In a comparative study of grassland ecosystem and pond ecosystem it may be observed that:

a. Primary and secondary consumers are similar
b. Both biotic and abiotic components are different
c. The biotic components are almost similar
d. The abiotic components are almost similar
Answer  Explanation 

ANSWER: Both biotic and abiotic components are different

Explanation:
No explanation is available for this question!


24)   Mr. X is eating curd/yoghurt. For this food intake in a food chain he should be considered as occupying:

a. First trophic level
b. Second trophic level
c. Third trophic level
d. Fourth trophic level
Answer  Explanation 

ANSWER: Fourth trophic level

Explanation:
No explanation is available for this question!


25)   This is an inverted pyramid:

a. Pyramid of numbers in a grassland ecosystem
b. Pyramid of energy in a pond ecosystem
c. Pyramid of biomass in a grassland ecosystem
d. Pyramid of biomass in a pond ecosystem
Answer  Explanation 

ANSWER: Pyramid of biomass in a pond ecosystem

Explanation:
No explanation is available for this question!


26)   In food chain initial organisms are:

a. Top consumers
b. Secondary consumers
c. Primary consumers
d. Photo synthesizers
Answer  Explanation 

ANSWER: Photo synthesizers

Explanation:
No explanation is available for this question!


27)   If bamboo plant is growing in a far forest then what will be its trophic level?

a. First
b. Second
c. Third
d. Fourth
Answer  Explanation 

ANSWER: First

Explanation:
No explanation is available for this question!


28)   Which type of the following ecological pyramids are never inverted?

a. Pyramids of number
b. Pyramids of energy
c. Pyramids of biomass
d. Pyramids of dry biomass
Answer  Explanation 

ANSWER: Pyramids of energy

Explanation:
No explanation is available for this question!


29)   Which of the following food chain may not be directly dependent upon solar energy?

a. Grazing
b. Detritus
c. Soaking
d. Depleting
Answer  Explanation 

ANSWER: Detritus

Explanation:
No explanation is available for this question!


30)   Carbon cycle includes:

a. Producer, consumer, decomposer
b. Producer, consumer, producer
c. Producer , decomposer, consumer
d. Consumer, producer, decomposer
Answer  Explanation 

ANSWER: Producer, consumer, decomposer

Explanation:
No explanation is available for this question!


31)   Azolla is used as a biofertilizer because it:

a. Multiplies very fast to produce massive biomass
b. Has association of nitrogen-fixing Rhizobium
c. Has association nitrogen fixing Cyanobacteria
d. Has association of mycorrhiza
Answer  Explanation 

ANSWER: Has association nitrogen fixing Cyanobacteria

Explanation:
No explanation is available for this question!


32)   Plants like Saccharum. Imperata, Capparis and Acacia occur in the following biome:

a. Temperatr grassland
b. Tropical savannah
c. Tropical rain forest
d. Desert
Answer  Explanation 

ANSWER: Tropical savannah

Explanation:
No explanation is available for this question!


33)   During anaerobic digestion of organic waste, such as in producing biogas, which of the following is left undergraded?

a. Lignin
b. Lipids
c. Cellulose
d. Hemi-cellulose
Answer  Explanation 

ANSWER: Lignin

Explanation:
No explanation is available for this question!


34)   Nektons are:

a. Organisms that swim in water
b. Floating plants
c. Suspended lower plants
d. Animals associated with plants
e. Algae
Answer  Explanation 

ANSWER: Organisms that swim in water

Explanation:
No explanation is available for this question!


35)   The temperate broad-leaf forest biomes are characterized by the predominance of

a. Cupressus sp.
b. Dalbergia sp.
c. Diospyros sp.
d. Quercus sp.
Answer  Explanation 

ANSWER: Quercus sp.

Explanation:
No explanation is available for this question!


36)   These belong to the category of primary consumers:

a. Snakes and frogs
b. Water insects
c. Eagle and snakes
d. Insects and cattle
Answer  Explanation 

ANSWER: Insects and cattle

Explanation:
No explanation is available for this question!


37)   The plants of Cupressus and Cedrus are characteristic of:

a. Temperate broad-leaf forest
b. Temperate coniferous forest
c. Chaparral
d. Desert
Answer  Explanation 

ANSWER: Temperate coniferous forest

Explanation:
No explanation is available for this question!


38)   The moist tropical deciduous forest biomes show predominace of plants like:

a. Larix and Abies
b. Zizyphus and Butea
c. Shorea and Tectona
d. All of these
Answer  Explanation 

ANSWER: Shorea and Tectona

Explanation:
No explanation is available for this question!


39)   Buttresses are usually found in the plants growing in:

a. Tropical deciduous forests
b. Temperate coniferous forests
c. Temperate broad-leaf forest
d. Tropical rain forest
Answer  Explanation 

ANSWER: Tropical rain forest

Explanation:
No explanation is available for this question!


40)   In a biome the life form of climatic climax vegetation is:

a. Uniform
b. Variable
c. Absent
d. Unpredictable
Answer  Explanation 

ANSWER: Uniform

Explanation:
No explanation is available for this question!


41)   The fungi in a forest ecosystem act as:

a. Macroconsumer
b. Decomposer
c. Omnivore
d. Producer
Answer  Explanation 

ANSWER: Decomposer

Explanation:
No explanation is available for this question!


42)   Decomposers are:

a. Autotrophs
b. Heterotrophs
c. Organotropbs
d. Autoheterotrophs
Answer  Explanation 

ANSWER: Heterotrophs

Explanation:
No explanation is available for this question!


43)   In the phosphorus cycle, weathering makes phosphate available first to:

a. Decomposers
b. Consumers
c. Producers
d. All the above
Answer  Explanation 

ANSWER: Producers

Explanation:
No explanation is available for this question!


44)   During food chain the maximum energy is stored in:

a. Producers
b. Decomposers
c. Herbivores
d. Carnivores
Answer  Explanation 

ANSWER: Producers

Explanation:
No explanation is available for this question!


45)   In the following there is no difference:

a. Trophic level 1st and herbivores
b. Primary consumers and herbivores
c. Primary carnivore and trophic level 2nd
d. Secondary consumer and herbivores
Answer  Explanation 

ANSWER: Primary consumers and herbivores

Explanation:
No explanation is available for this question!


46)   The ultimate energy source of ecosystem is:

a. Solar energy
b. Biomass
c. Producer
d. Carbohydrates
Answer  Explanation 

ANSWER: Solar energy

Explanation:
No explanation is available for this question!


47)   Ecological pyramids were discovered by:

a. Elton
b. Odum
c. Reiter
d. None of these
Answer  Explanation 

ANSWER: Elton

Explanation:
No explanation is available for this question!


48)   An ecosystem which can be easily damaged but can recover after sometime if damaging effect stops will be having:

a. High stability and low resilience
b. Low stability and low resilience
c. Low stability and high resilience
d. High stability and high resillience
Answer  Explanation 

ANSWER: High stability and high resillience

Explanation:
No explanation is available for this question!


49)   The correct sequence of food chain is:

a. Grass-insect-bird-snake
b. Grass-bird-insect-snake
c. Snake-bird-insect-grass
d. Grass-snake-bird-insect
Answer  Explanation 

ANSWER: Grass-insect-bird-snake

Explanation:
No explanation is available for this question!


50)   Bacteria and fungi in a forest ecosystem are generally:

a. Producers
b. Decomposers
c. Primary consumers
d. Secondary consumers
e. Tertiary consumers
Answer  Explanation 

ANSWER: Decomposers

Explanation:
No explanation is available for this question!