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Ecosystem

203 Questions Start Errorless Test
All Exams Allen Errorless
RPMT 1997 Q151 Errorless 1. Ecosystem MCQ
The living organisms of all ecosystems collectively constitute
A.
Producers
B.
Decomposers
C.
Consumers
D.
Biosphere
CBSE PMT 1996; MHCET 2001 Q152 Errorless 1. Ecosystem MCQ
10% law of flow of energy in ecosystem was proposed by
A.
Lindeman
B.
Carl Mobius
C.
Tansley
D.
Darwin
CBSE PMT 1996 Q153 Errorless 1. Ecosystem MCQ
If forest area is reduced to half, which one of the following will be a long term effect
A.
The natives (tribals) of that area will die on account of hunger
B.
Cattles of that area will die due to scarcity of fodder
C.
The diversity in germplasm will effect the crop breeding
D.
It will be converted into large desert
MP PMT 1996, 99 Q154 Errorless 1. Ecosystem MCQ
The first link in any food chain is always a green plant because
A.
They are widely distributed
B.
They are firmly fixed to the soil
C.
They alone have a capacity to fix atmospheric $\mathrm{CO}_{2}$ in the presence of sunlight
D.
All of the above
MP PMT 1996 Q155 Errorless 1. Ecosystem MCQ
Food levels in an ecosystem are called
A.
Trophic levels
B.
Consumer levels
C.
Producer levels
D.
Herbivore levels
Bihar PMT 1995; MP PMT 2000; CPMT 2002; RPMT 2005; Odisha JEE 2011; J & K CET 2012 Q156 Errorless 1. Ecosystem MCQ
Which of the following is source of energy to an ecosystem [NCERT Pg. No. 206]
A.
Solar energy
B.
Sugar stored
C.
Heat liberated during respiration
D.
ATP
MP PMT 1995 Q157 Errorless 1. Ecosystem MCQ
The number of primary producer within a specified area would be maximum in
A.
River
B.
Pond ecosystem
C.
Lake
D.
Estuary
CPMT 1995, 2002; EAMCET 1996; MP PMT 1997, 2001; BHU 2002; RPMT 2005; NEET (Phase-I) 2016 Q158 Errorless 1. Ecosystem MCQ
The word ā€œecosystemā€ was first coined by
A.
Weaver and Clements
B.
A.G. Tansley
C.
E.P. Odum
D.
By all the above
RPMT 1995 Q159 Errorless 1. Ecosystem MCQ
Which of the following abundantly occurs in pond ecosystem Or In a food chain, which of the following produces in the largest amount [CBSE PMT 1996]
A.
Producer
B.
Consumer
C.
Top consumer
D.
Decomposers
CBSE PMT 1995; MHCET 2000; MP PMT 2000; BHU 2002 Q160 Errorless 1. Ecosystem MCQ
Which of the following is the most stable and largest ecosystem of the world
A.
Mountain
B.
Desert
C.
Forest
D.
Ocean
CBSE PMT 1995; BVP 2001; MHCET 2001 Q161 Errorless 1. Ecosystem MCQ
In a biotic community, primary consumers are
A.
Omnivores
B.
Carnivores
C.
Detritivores
D.
Herbivores
EAMCET 1995; MHCET 2003 Q162 Errorless 1. Ecosystem MCQ
In a food chain, lion is a
A.
Secondary consumer
B.
Primary consumer
C.
Tertiary consumer
D.
Secondary producer
EAMCET 1995; BHU 2000, 01; AFMC 2001; MHCET 2003 Q163 Errorless 1. Ecosystem MCQ
In a pond ecosystem, benthos means
A.
Primary consumers in the depth of a pond
B.
Zooplankton on the water surface
C.
Periphyton
D.
Epineuston
CBSE PMT 1994 Q164 Errorless 1. Ecosystem MCQ
The character of an ecosystem is determined by the environmental factor which is shortest supply. This is the
A.
Law of minimum
B.
Law of diminishing returns
C.
Law of limiting factors
D.
Law of supply and demand
JIPMER 1994; Kerala PMT 2004; KCET 2018 Q165 Errorless 1. Ecosystem MCQ
Which must be preserved in an ecosystem, if the system is to be maintained
A.
Producers and carnivores
B.
Producers and decomposers
C.
Carnivores and decomposers
D.
Herbivores and carnivores
MP PMT 1994, 95, 97, 2002 Q166 Errorless 1. Ecosystem MCQ
The pyramid of energy in a forest ecosystem is
A.
Always upright
B.
Always inverted
C.
Both upright and inverted
D.
None of the above
KCET 1994; MP PMT 1995, 2002 Q167 Errorless 1. Ecosystem MCQ
In an ecosystem, there is flow of energy at different trophic levels. This is as follows
A.
Primary consumers ā€” Tertiary consumers ā€” Secondary consumers ā€” Decomposers ā€” Producers
B.
Producers ā€” Primary consumers ā€” Secondary consumers ā€” Tertiary consumers ā€” Decomposers
C.
Producers ā€” Decomposers ā€” Primary consumers ā€” Tertiary consumers ā€” Secondary consumers
D.
Producers ā€” Primary consumers ā€” Tertiary consumers ā€” Secondary consumers ā€” Decomposers
KCET 1994 Q168 Errorless 1. Ecosystem MCQ
We refer to the following as the food chain
A.
Large number of animals near a source of food
B.
Transfer of food energy from the green plants through a series of consumer organisms
C.
Large number of human beings forming a human chain near a source of food
D.
None of these
MP PMT 1994, 98; MHCET 2003 Q169 Errorless 1. Ecosystem MCQ
Biological equilibrium is found among the
A.
Producer plants
B.
Consumers and producers
C.
Decomposers
D.
Producers, consumers and decomposers
MP PMT 1994 Q170 Errorless 3. Critical Thinking MCQ
Which of the following word is related to Homo sapiens
A.
Herbivore
B.
Carnivore
C.
Autotroph
D.
Omnivore
CPMT 1993; MP PMT 1995; BVP 2002 Q171 Errorless 1. Ecosystem MCQ
Nepenthes is a
A.
Primary producer
B.
Consumer
C.
Primary producer and consumer
D.
None of the above
CBSE PMT 1993 Q172 Errorless 1. Ecosystem MCQ
The pyramid of number is based on
A.
Unit per area
B.
Food per individual
C.
Individuals in trophic level
D.
None of these
MP PMT 1993, 98, 99; BHU 2000 Q173 Errorless 1. Ecosystem MCQ
Ecosystem has two components
A.
Plants and animals
B.
Weeds and trees
C.
Biotic and abiotic
D.
Frog and men
MP PMT 1993, 2011 Q174 Errorless 1. Ecosystem MCQ
Ecosystem creates
A.
Food chain
B.
Food web
C.
Both the above
D.
None of the above
MP PMT 1993; Bihar PMT 2005; MP PMT 2005 Q175 Errorless 1. Ecosystem MCQ
In lake ecosystem, pyramid biomass is
A.
Upright
B.
Inverted
C.
Anything is possible
D.
None is correct