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Ecosystem

203 Questions Start Errorless Test
All Exams Allen Errorless
CBSE PMT 1999; BHU 2005, 08; DUMET 2010; AMU (Med.) 2010 Q126 Errorless 1. Ecosystem MCQ
What energy percentage can be captured by the organisms of next trophic level Or Transfer of energy from one trophic level to other trophic level is according to the second law of thermodynamics. The efficiency of energy transfer from herbivorous to carnivorous is [CBSE PMT 1996; AIEEE Pharmacy 2004]
A.
$20\%$
B.
$30\%$
C.
$90\%$
D.
$10\%$
AIIMS 1999 Q127 Errorless 1. Ecosystem MCQ
The food chain in which microbes split energy rich compounds of the producer community is
A.
Parasitic food chain
B.
Detritus food chain
C.
Predators food chain
D.
Producer food chain
MP PMT 1999, 2006 Q128 Errorless 1. Ecosystem MCQ
Ecosystem may be defined as
A.
Group of plants which act as the energy suppliers
B.
Group of organisms which form population
C.
Functional unit for ecological studies
D.
None of these
MP PMT 1999 Q129 Errorless 1. Ecosystem MCQ
In an ecosystem in abiotic components which of the following occur
A.
Flow of energy
B.
Cycling of materials
C.
Consumers
D.
Flow of energy and cycling of materials
MP PMT 1999 Q130 Errorless 1. Ecosystem MCQ
The snakes are included under
A.
Saprophytes
B.
Primary consumers
C.
Second trophic level
D.
None of these
MP PMT 1999 Q131 Errorless 1. Ecosystem MCQ
The zooplanktonic forms are
A.
Primary consumers
B.
Secondary consumers
C.
Carnivores
D.
Primary producers
CBSE PMT 1999 Q132 Errorless 1. Ecosystem MCQ
The maximum biomagnification would be in which of the following in case of aquatic ecosystem
A.
Fishes
B.
Birds
C.
Zooplanktons
D.
Phytoplanktons
Pb. PMT 1999; RPMT 1999 Q133 Errorless 1. Ecosystem MCQ
Biomass pyramid of forest is
A.
Inverted
B.
Upright
C.
Infinite
D.
Finite
MP PMT 1999 Q134 Errorless 3. Critical Thinking MCQ
An ecosystem may be defined as
A.
A localised association of several plants and animals
B.
Different communities of plants, animals and microbes together with their physico-chemical environments
C.
Different communities of plants and microbesplus their physicochemical environments
D.
Rate of decomposition of other components will be very high
BHU 1999 Q135 Errorless 3. Critical Thinking MCQ
Among the plants listed, point out one that does not fit into ecological group represented by other plants
A.
Acacia
B.
Rhizophora/Vallisneria
C.
Euphorbia
D.
Aloe
MP PMT 1999; CBSE PMT 2001 Q136 Errorless 4. Self Evaluation Test MCQ
Food chains are met with only in the
A.
Sea
B.
Cities
C.
Forests
D.
In all the places
MP PMT 1998; BHU 2002 Q137 Errorless 1. Ecosystem MCQ
The pyramid of number in a grassland ecosystem is
A.
Always erect
B.
Always inverted
C.
Either erect or inverted
D.
Irregular
MP PMT 1998 Q138 Errorless 1. Ecosystem MCQ
The number of individuals of a species in a particular ecosystem at a given time remains constant due to
A.
Man
B.
Parasites
C.
Predators
D.
Available food
CPMT 1998 Q139 Errorless 1. Ecosystem MCQ
Ecosystem is defined as
A.
Relation between plants and animals
B.
Relation between biotic and physical components
C.
Relation between producers and decomposers
D.
None of these
CPMT 1998; BHU 2001, 06; Pb. PMT 2004 Q140 Errorless 1. Ecosystem MCQ
Decomposers are
A.
Autotrophs
B.
Heterotrophs
C.
Autoheterotrophs
D.
Organotrophs
CBSE PMT 1998 Q141 Errorless 1. Ecosystem MCQ
In a terrestrial ecosystem such as forest, maximum energy is in which trophic level
A.
$T_{1}$
B.
$T_{2}$
C.
$T_{3}$
D.
$T_{4}$
CBSE PMT 1998; BHU 1999; Kerala CET 2003 Q142 Errorless 1. Ecosystem MCQ
The rate at which light energy is converted into chemical energy of organic molecules is the ecosystem's Or In an ecosystem the rate of production of organic matter during photosynthesis is termed as [AIPMT (Cancelled) 2015]
A.
Net primary productivity
B.
Gross secondary productivity
C.
Net secondary productivity
D.
Gross primary productivity
AIIMS 1998 Q143 Errorless 1. Ecosystem MCQ
The relationship in an ecosystem can be depicted in
A.
Pyramid of energy
B.
Pyramid of biomass
C.
Pyramid of numbers
D.
All of these
CBSE PMT 1997 Q144 Errorless 1. Ecosystem MCQ
Which of the following acts as ā€œnatureā€™s scavengersā€
A.
Man
B.
Animals
C.
Insects
D.
Micro-organisms
RPMT 1997 Q145 Errorless 1. Ecosystem MCQ
In a tree ecosystem, the pyramid of number is
A.
Upright
B.
Inverted
C.
Both of the above
D.
None of the above
CBSE PMT 1997, 2004 Q146 Errorless 1. Ecosystem MCQ
Which of the following ecosystem has the highest gross primary productivity Or Among the ecosystem mentioned below where can one find maximum biodiversity [NCERT]
A.
Grassland
B.
Coral reef
C.
Mangroves
D.
Rain forest
MP PMT 1997 Q147 Errorless 1. Ecosystem MCQ
In an ecosystem bacteria are considered as
A.
Microconsumers
B.
Macroconsumers
C.
Primary consumers
D.
Secondary consumers
MP PMT 1997 Q148 Errorless 1. Ecosystem MCQ
A lake ecosystem is
A.
Artificial
B.
Abiotic
C.
Natural
D.
Hydrological
MP PMT 1997 Q149 Errorless 1. Ecosystem MCQ
Ecological pyramids are of
A.
Two types
B.
Three types
C.
Four types
D.
Five types
RPMT 1997 Q150 Errorless 1. Ecosystem MCQ
Which of the following ecosystems would be most stable
A.
Man made forest
B.
Fresh water lake
C.
Saline lake
D.
Natural forest