Actively moving organism in aquatic ecosystem
1.Phytoplankton
2.Benthos
3.Nekton
4.Zoo plankton
Afforestation should be with .
1. Exotic species
2. Indigenous species
3.Bamboos
4. Eucalyptus
An organisms contains carbon molecules which have passed through three levels of ecosystem, the organisms is
1.Priamry consumer
2.Predator
3.Tertiary consumer
4.Producer
Antimalarial drug quinine is got from
1.Root of Cycas
2.Bark of Cinchona
3.Stem of Mango
4.None
Biomass produced by plants in oceans accounts for
1.85%
2.75%
3.65%
4.55%
Common indicator organism of water pollution is:
1.Entamoeba histolytica
2.Escherichia coli
3.Eichhornia crassipes
4.Lemna paucicostata
dB is a standard abbreviation used for the quantitative expression of
1.The density of bacteria in a medium
2.The dominant Bacillus in a culture
3.A certain pesticide
4.A particular pollutant
Deserts, grasslands, forests and tundra are the examples of
1.Biomes
2.Biogeographical regions
3.Ecosystems
4.Biospheres
Dominant plants of cold desert are
1.Tall trees and herbaceous plants
2.Low stature shrubs and herbaceous plants
3.Shrubs and small trees
4.Low stature shrubs and perennial grasses
Each successive trophic level has
1.Less total energy
2.More total energy
3.Increased total energy
4.Non- estimated energy contents
Ecological efficiency is
1.Food primary assimilated/food energy ingested 100
2.Gross primary productivity/ incident total solar radiation 100
3.Volume of CO2 evolved/volume of O2 consumed
4.Energy in biomass production at a trophic level/energy in biomass productio
energy flow in ecosystem is...
1.bidirectional
2.multidirectional
3.unidirectional
4.all around
Energy transfer from organisms to organism in a natural community develops
1.Biological control
2.Food chain
3.Natural barriers
4.Food web
Forest which is never leafless
1.Tropical deciduous forest
2.Tropical forest
3.Temperate deciduous forest
4.Temperate forest
identify the correct type of food chain: dead animal=blow fly maggots= common frog= snake
1.decomposer food chain
2.detrital food chain
3.grazing food chain
4.predator food chain
identify the correct type of food chain: dead animal=blow fly maggots= common frog= snake
1.decomposer food chain
2.detrital food chain
3.grazing food chain
4.predator food chain
Identify the correctly matched pair
1.Basal Convention - Biodiversity Conservation
2.Montreal Protocol - Global warming
3.Kyoto protocol - Climatic change
4.Ramsar Convention - Ground water pollution
If all the plants are to die, all the animals will also die due to deficiency of
1.Food
2.Carbon dioxide
3.Timber
4.Oxygen
In a lake, phytoplankton grow in abundance in
1.Littoral zone
2.Limnetic zone
3.Profundal zone
4.Benthic region
In an area where DDT had been used extensively, the population of birds declined significantly because
1.Cobras were feeding exclusively on birds
2.Many of the birds eggs laid, did not hatch
3.Birds stopped laying eggs
4.Earthworms in the area got eradicated
In grassland ecosystem, the number of primary producers is about 6 million. The number of top carnivore supported by it would be
1.60
2.30
3.6
4.3
In nitrification ammonia is first oxidized to nitrite by
1.Nitrosomonas and nitrosococcus
2.Nitrosomonas and nitrobacter
3.Pseudomonas and nitrosococus
4.Pseudomonas and thiobacillus
Industrial melanism is an example of
1.Protective resemblance with the surrounding
2.Drug resistance
3.Defensive adaptation of skin against UV radiations
4.Darkening of skin due to industries
It is not a protected forest
1.Reserve forest
2.Sanctuary
3.Core of biosphere
4.Orchard
Land mass occupied by forest is about
1.11%
2.22%
3.30%
4.60%
Lichens can be used as :
1.Source of wood
2.Initial vegetation for waste lands
3.Bio-indicator for water and air pollution
4.To check the air pollution
Littoral zone is located along the
1.High mountains
2.Sea
3.River
4.Desert
Maximum human population can be supported if all the humans are
1.Carnivores
2.Pure vegetarian
3.Vegetarian along with use of milk
4.Vegetarian alongwith use of milk and eggs
Niche is defined as the
1.Position of species in a community in relation to other species
2.Place where organism lives
3.Place where organism lives and performs its duty
4.Place where population perform their duties
Phytoplankton are dominant in
1.Benthic zone
2.Littoral zone
3.Profundal zone
4.Limnetic zone
Plant species having a wide range of genetical distribution evolve into a local population known as
1.Biome
2.Ecotype
3.Population
4.Ecosystem
Renewable exhaustible natural resource of energy is
1.Biomass/Forest
2.Petroleum
3.Coal
4.Kerosene
Shell of egg in bird becomes thin (not properly formed) due to the pollution of pesticides. This is due to interference in the activity of :
1.Calmodulin
2.Mg ATPase
3.Ca ATPase
4.None of these
Sunderbans contain mainly
1.Alpine trees
2.Mangrove plants
3. Grass
4.Fir forest
The correct sequence of plants in a hydrosere is
1.Oak → Lantana → Volvox → Hydrilla → Pistia →
2.Oak → Lantana → Scirpus → Pistia → Hydrilla →
3.Volvox → Hydrilla → Pistia → Scirpus → Lantana U
4.Pistia → Volvox → Scirpus → Hydrilla → Oak →
The rate of formation of new organic matter by rabbit in a grassland, is called
1.Net productivity
2.Secondary productivity
3.Net primary productivity
4.Gross primary productivity
These belong to the category of primary consumers
1.snakes and frog
2.insects and cattle
3.eagle and snakes
4.water insects
Which can be tropic level of a lion in from ecosystem?
1.T3
2.T2
3.T4
4.T1
which is the reason for highest biomaas in aquatic ecosystem?
1.benthonic and brown algae
2.sea grass, and slime molds
3.nanoplankton, blue green algae, green algae
4.diatoms
which of the following is an example of man made ecosystem?
1.tissue culture
2.aquarium
3.herbarium
4.forest
Which of the following is expected to have the highest value (gm/m2/yr) in a grassland ecosystem?
1.Tertiary production
2.Gross production (GP)
3.Net production (NP)
4.Secondary production
Which of the following is primary consumer?
1.Producer
2.Carnivore
3.Top carnivore
4.Herbivore
Which one of the following correctly represents an organism and its ecological niche?
1.Vallisneria and pond
2.Desert locust (Schistocerca) and desert.
3.Vultures and dense forest
4.Plant lice (aphids) and leaf
Which one of the following is a wrong statement?
1.Greenhouse effect is a natural phenomenon
2.Eutrophication is a natural phenomenon in freshwater bodies
3.Most of the forests have been lost in tropical areas
4.Ozone in upper part of atmosphere is harmful to animals
Which one of the following is commonly found in temperate coniferous forest?
1.Quercus
2.Dipterocarpus
3.Shorea robusta
4.Pinus wallichiana
which one of the following is correct matching of a plant, its habit and the forest type where it normally occurs?
1.prosopis,tree,scrub
2.saccharum,grass,forest
3.shorea robusta, herb, tropical rain forest
4.none of these
which one of the following is one of the characteristic of a biological community?
1.sex-ratio
2.stratification
3.natality
4.mortality
which one of the following pairs in mismatched?
1.tundra-permafrost
2.coniferous forest- evergreen trees
3.savanna - acacia trees
4.prairie - epiphytes
Which one of the following types organisms occupy more than one trophic level in a ecosystem
1.Phytoplankton
2.Frog
3.Zooplankton
4.Fish
Wildlife is destroyed most when
1.There is lack of proper care
2.Mass scale hunting for foreign trade
3.Its natural habitat is destroyed
4.Natural calamity