Posts
Q.1 Pond is an example of ........ecosystem -
(1) Artifical (2) Natural
(3) Forest (4) Grassland
Q.2 Which of the following is the most productive ecosystem ?[
(1) Estuary (2) Open sea
(3) Desert (4) Mountain
Q.3 The pyramid of energy in a forest ecosystem is -
(1) Always upright
(2) Always inverted
(3) Both upright and inverted
(4) None of the above
Q.4 The importance of ecosystem is -
(1) Flow of energy (2) Cycling of materials
(3) Both of the above (4) None of the above
Q.5 Which is the correct path of energy flow in an eco system is - [C.G. PMT 2004]
(1) Producers ® Carnivores ® Herbivores ® Decomposers
(2) Producers ® Herbivores ® Carnivores ® Decomposers
(3) Herbivores ® Carnivores ® Producers ® Decomposers
(4) Herbivores ® Producers ® Carnivores ® Decomposers
Q.6 The number of primary producers within a specified area would be maximum in -
[C.G. PMT 2004]
(1) Grassland ecosystem
(2) Forest ecosystem
(3) Pond ecosystem
(4) Deserts
Q.7 A food chain starts with -
(1) Nitrogen fixation organisms
(2) Phtosynthesising organisms
(3) Respiration
(4) Decomposers
Q.8 Nepenthes is a -
(1) Primary producer
(2) Consumer
(3) Both primary producer and consumer
(4) None of the above
Q.9 Biological equilibrium is found among the -
(1) Producers and consumers
(2) Producers and decomposers
(3) Producers, consumers and decomposers
(4) Producers and light
Q.10 The number of individuals of a species in a particular ecosystem at a given time remains constant due to - [C.G. PMT 2005]
(1) Man (2) Parasites
(3) Predators (4) Available food
Q.11 The two components of an ecosystem are -
(1) Biotic and abiotic
(2) Plants and animals
(3) Weeds and micro-organism
(4) Plants and light
Q.12 The pyramid of number in a grassland ecosystem is - [C.G. PMT 2005]
(1) Linear (2) Upright
(3) Irregular (4) Inverted
Q.13 The cycling of elements in an ecosystem is called - [C.G. PMT 2006]
(1) Chemical cycle
(2) Biogeochemical cycle
(3) Geological cycle
(4) Geochemical cycle
Q.14 Which of the following bacteria has potential for nitrogen fixation ? [C.G. PMT 2006]
(1) Nitrosomonas (2) Nitrobacter
(3) Nitrosococcus (4) Rhizobium
Q.15 Ecosystem has - [JHARKHAND 2006]
(1) Plant and animal
(2) Air and H2O
(3) Soil and light
(4) Biotic and abiotic component
Q.16 Sal and teak are found in - [JHARKHAND 2006]
(1) Tropical rain forest
(2) Tropical deciduous forest
(3) Temperature board leaf forest
(4) Temperature needle leaf forest
Q.17 Decomposers are -
(1) Autrophs (2) Hetrotrophs
(3) Organotrophs (4) Autoheterotrophs
Q.18 During food chain the maximum energy is stored in -
(1) Producers (2) Decomposers
(3) Herbivores (4) Carnivores
Q.19 In the phosphorus cycle, weathering makes phosphate available first to -
(1) Decomposers (2) Consumers
(3) Producers (4) All the above
Q.20 In a food chain, the total amount of living material is depicted by -
(1) Pyramid of biomass
(2) Pyramid of energy
(3) Pyramid of number
(4) Trophic levels
Q.21 Nitrates are converted to nitrogen by -
[JHARKHAND 2005]
(1) Nitrogen fixing bacteria
(2) ammonification bacteria
(3) Denitrifying bacteria
(4) Nitrifying bacteria
Q.22 In pond ecosystem, diatoms represent -
(1) Producers [JHARKHAND 2004]
(2) Primary consumers
(3) Secondary consumers
(4) Tertiary consumers
Q.23 Pyramids of biomass in pond ecosystem is -
[Bihar 2005]
(1) Inverted (2) Upright
(3) Linear (4) Irregular
Q.24 Lion is kept under in Etoplian pyramid as -
(1) Producer
(2) Primary consumer
(3) Seconary consumer
(4) Tertiary consumer
Q.25 Bacteria and fungi developing on dead decaying organisms are -
(1) Parasites (2) Commensals
(3) Saprophytes (4) Symbionts
Q.26 Phytoplanktons are important biotic comoponent of -
(1) Grassland
(2) Pond ecosystem
(3) Forest ecosystem
(4) None of these
Q.27 Which ecological pyramid can never occur in an inverted form ?
(1) Pyramid of number
(2) Pyramid of biomass
(3) Pyramid of energy
(4) Pyramid of species richess
Q.28 Peacock eats a snake and snake eats insect while insect eats green plant, then position of peacock is - [UP CPMT 2002]
(1) Primary producer
(2) Secondary producer
(3) Decomposer
(4) Top at the apex of food pyramid
Q.29 Source of energy in an ecosystem is -
(1) Sun
(2) ATP
(3) Sugar made by plant
(4) Green plant
Q.30 Legume plants are important for atmosphere because they -
(1) Help in NO2 fixation
(2) Do not help in NO2 fixation
(3) Incrase soil fertility
(4) All of these
Q.31 Tropical dense forest are due to -
(1) Low rainfall and low temperature
(2) High rainfall and low temperature
(3) Low rainfall and high temperatrue
(4) High rainfall and high temperature
Q.32 Energy enters in food chain-
(1) by producer
(2) by primary consumers
(3) by secondary consumers
(4) by tertiary consumers
Q.33 In an ecosystem - [RPMT - 2000]
(1) Primary producers are more than primary consumers
(2) Primary consumers are larger than primary producers
(3) Secondary consumers are larger than primary producers
(4) Primary consumers are least depend on primary producers
Q.34 In Which type of the forest, humus is formed by the dry and dead leaves - [RPMT - 2001]
(1) Coniferous forest (2) Decidous forest
(3) Tundra forest (4) Alpine
Q.35 A pond is a - [RPMT - 2002]
(1) Biome
(2) Natural ecosystem
(3) Artifical ecosystem
(4) Community of plants & animals
Q.36 The importance of ecosystem lies in -
(1) Energy flow
(2) Cycling of materials
(3) Both
(4) None
Q.37 Concept of Ecological pyramid was given by -
(1) Odum (2) Elton
(3) Darwin (4) Reiter
Q.38 Stratification is found in -
(1) Tundra (2) Tropical forest
(3) Deciduous forest (4) Desert
Q.39 Driving force of ecosystem is -
[RPMT - 2004]
(1) Producers
(2) Plants with Carbohydrate
(3) Biomass
(4) Solar energy
Q.40 Ecosystem creates - [RPMT - 2005]
(1) Food chain (2) Food web
(3) Food (4) None
Q.41 Ecosystem term coined by -
(1) P. Maheshwari (2) Tansley
(3) R. Mishra (4) P. Odum
Q.42 Biosphere refers to -
(1) Plants of the world
(2) Special plants
(3) Area occupied by living beings
(4) Plants of a particular area
Q.43 Mr. X is eating curd/yoghurt. For this food intake in a food chain he should be considered as occupying - [AIIMS-2003]
(1) First trophic level
(2) Second trophic level
(3) Third tropic level
(4) Fourth trophic level
Q.44 The Great Barrier Reef along the east coast of Australia can be categorized as -
[AIIMS-2004]
(1) Population (2) Community
(3) Ecosystem (4) Biome
Q.45 Which one of the following correctly represents an organism and its ecological niche ?
[AIIMS-2005]
(1) Vallisneriaand pond
(2) Desert locust (Schistocerca) and desert
(3) Plant lice (aphids) and leaf
(4) Vultures and dense forest
Q.46 Given below is one of the types of ecological pyramids. This type represents -
[AIIMS-2005]
(1) Pyramid of numbers in a grassland
(2) Pyramid of biomass in a fallow land
(3) Pyramid of biomass in a lake
(4) Energy pyramid in a spring
Q.47 Which one of the following is correct matching of a plant, its habit and the forest type where it normally occurs? [AIIMS-2005]
(1) Prosopis, tree, scrub
(2) Saccharum, grass, forest
(3) Shorearobusta, herb, tropical rain forest
(4) Acacia catechu, tree, coniferous forest
Q.48 Acacia, Prosopis and Caparis belongs to -
(1) Deciduous forest
(2) Tropical forest
(3) Thorn forest
(4) Evergreen forest
Q.49 Total amount of energy trapped by green plants in food is called -
(1) Gross primary production
(2) Net primary production
(3) Standing crop
(4) Standing state
Q.50 Bacteria are essential in carbon cycle as -
(1) Decomposer (2) Synthesizer
(3) Consumer (4) Pri. Producer
Q.51 In which biome a new plant may adapt soon -
[AIPMT-1998]
(1) Tropical rain forest (2) Desert
(3) Mangrove (4) Sea island
Q.52 Percentage energy transferred to higher trophic level in food chain is - [AIPMT-1999]
(1) 1 % (2) 10 %
(3) 90 % (4) 100 %
Q.53 Which is the reason for highest biomass in aquatic ecosystem - [AIPMT-2000]
(1) Nano plankton, blue green algae, green algae
(2) Sea grass, and slime molds
(3) Benthonic and brown algae
(4) Diatoms
Q.54 Which of the following is a correct pair -
(1) Cuscuta - parasite [AIPMT-2002]
(2) Dischidia - insectivorous
(3) Opuntia - predator
(4) Capsella - hydrophyte
Q.55 Bamboo plant is growing in a far forest then what will be the tropic level of it - [AIPMT-2002]
(1) First trophic level (T1)
(2) Second trophic level (T2)
(3) Third trophic level (T3)
(4) Fourth trophic level (T4)
Q.56 Which of the following is expected to have the highest value (gm/m2/yr) in a grassland ecoystem - [AIPMT-2004]
(1) Tertiary production
(2) Gross production (GP)
(3) Net production (NP)
(4) Secondary production
Q.57 An ecosystem which can be easily damaged but can recover after some time if damaging effect stops will having - [AIPMT-2004]
(1) High stability and low resilience
(2) Low stability and low resilience
(3) High stability and high resilience
(4) Low stability and high resilience
Q.58 Which one of the following pairs is mismatched -
(1) Savanna - acacia trees [AIPMT-2005]
(2) Coniferous forest - evergreen trees
(3) Tundra - permafrost
(4) Prairies - epiphytes
Q.59 Which one of the following is not used for construction of ecological pyramids ?
(1) Rate of energy flow [AIPMT-2005]
(2) Fresh weight
(3) Dry weight
(4) Number of individuals
Q.60 Which one of the following ecosystem types has the highest annual net primary productivity-
[AIPMT-2007]
(1) Temperate deciduous forest
(2) Tropical rain forest
(3) Tropical deciduous forest
(4) Temperate evergreen forest
Q.61 Quercus species are the dominant component in - [AIPMT-2008]
(1) Scrub forests
(2) Tropical rain forests
(3) Temperatre deciduous forests
(4) Alpine forests
Q.62 Consider the following statements concenrning food chain - [AIPMT-2008]
(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 deers
(c) The length of food chains is generally limited to 3-4 trophic levels due to energy loss
(d) The length offood chains may very from 2 to 8 trophic levels
Which two of the above statements are correct ?
(1) a, c (2) a, b (3) b, c (4) c, d
Q.63 The slow rate of decomposition of fallen logs in nature is due to their - [AIPMT-2003]
(1) Anaerobic environment around them
(2) L:ow cellulose content
(3) Low moisture content
(4) Poor nitrogen content
Q.64 Which one of the following types of organisms occupy more than one trophic level in a pond ecosystem ? [AIPMT-2009]
(1) Frog (2) Phytoplankton
(3) Fish (4) Zooplankton
Q.65 Study the four statements (1-4) given below and select the two correct once out of them-
[Pre-AIPMT-2010]
(A) A lion eating a deer and a sparrow feeding on grain are ecologically similar in being consumers
(B) Predator star fish helps in maintaining species diversity of some invertebrates
(C) Predators ultimately lead to the extinction of prey species
(D) Production of chemicals such as nicotine, strychnine by the plants are metabolic disorders
The two correct statements are :
(1) A and D (2) A and B
(3) B and C (4) C and D
Q.66 The biomass available for consumption by the herbivores and the decomposers is called- [Pre-AIPMT-2010]
(1) Net primary productivity
(2) Secondary productivity
(3) Standing crop
(4) Gross primary productivity
Q.67 Which one of the following is one of the characteristics of a biological community? [Pre-AIPMT-2010]
(1) Stratification (2) Natality
(3) Mortality (4) Sex-ratio
Q.68 Which of the following representations shows the pyramid of numbers in a forest ecosystem? [Mains-AIPMT-2010]
(1)
(3)
Q.69 Mass of living matter at a trophic level in an area at any time is called :
[Pre-AIPMT-2011]
(1) Standing state (2) Standing crop
(3) Detritus (4) Humus
Q.70 Large Woody Vines are more commonly found in : [Pre-AIPMT-2011]
(1) Alpine forests (2) Temperate forests
(3) Mangroves (4) Tropical rainforests
Q.71 Which one of the following animals may occupy more than one trophic levels in the same ecosystem at the same time ?
[Mains-AIPMT-2011]
(1) Frog (2) Sparrow
(3) Lion (4) Goat
Q.72 The breakdown of detritus into smaller particles by earthworm is a process called :
[Mains-AIPMT-2011]
(1) Catabolism (2) Humification
(3) Fragmentation (4) Mineralisation
Q.73 In parasitic food chain, the pyramid of number is
[RPMT-2011]
(1) Inverted
(2) Upright
(3) Linear
(4) Upright and inverted
Q.74 Ten percent law of energy transfer in a food chain is given by [RPMT-2011]
(1) Schimper (2) Elton
(3) Haeckel (4) Lindemann
Q.75 In a food chain the largest population is that of
(1) Producers [RPMT-2011]
(2) Decomposers
(3) Secondary consumers
(4) Primary consumers
THANKS FOR READING MY POSTS. FOLLOW MY BLOG AND SHARE YOUR FRIENDS