Organism and the Environment Test 2

Total Questions:50 Total Time: 75 Min

Remaining:

 

Questions 1 of 50

Question:Ecology takes into account:

Answers Choices:

environmental factors only

plants adaptations only

effect of plants on environments

all the above

Questions 2 of 50

Question:Study of interrelationship between a species and its environment is called:

Answers Choices:

Forest ecology

Autecology

Synecology

Resource ecology

Questions 3 of 50

Question:The ultimate source of energy in an ecosystem is:

Answers Choices:

Glucose

ATP

Nucleic acid

Sunlight

Questions 4 of 50

Question:Light loving plants are known as:

Answers Choices:

Hcliophytes

Xerophytes

Lithophytes

None of the above

Questions 5 of 50

Question:Animals in cold regions have a fur because:

Answers Choices:

They like fur

Fur traps air

Hair is a good insulating material

None of these

Questions 6 of 50

Question:Cold-blooded animals are those:

Answers Choices:

which are cold to touch

which have cold blood

which live in cold environment

which cannot regulate their body temperature

Questions 7 of 50

Question:Property of soil based on the size of its particles is termed:

Answers Choices:

Colour

Texture

Field capacity

Water holding capacity

Questions 8 of 50

Question:A good soil is that which allows:

Answers Choices:

slow percolation of water

rapid percolation of water

selective percolation of silt

no percolation of water and silt

Questions 9 of 50

Question:Social position held by one organism with respect to its other associates is termed:

Answers Choices:

Habitat

Ecosphere

Niche

Ecotone

Questions 10 of 50

Question:A specific place or locality where an organism lives, is called:

Answers Choices:

Habit

Habitat

Biome

Biosphere

Questions 11 of 50

Question:An organism which carries a disease from one organism to another is called:

Answers Choices:

host

sterilization

inoculum

vector

Questions 12 of 50

Question:Cuscuta is an example of:

Answers Choices:

complete stem parasite

complete root parasite

partial root parasite

partial stem parasite

Questions 13 of 50

Question:Which of the following insects mimic a dry leaf?

Answers Choices:

Kalima

Carausius

Phyllium

None

Questions 14 of 50

Question:Collateral host means:

Answers Choices:

grass host

infected host

host in which life-cycle is completed

none of these

Questions 15 of 50

Question:Regeneration of community is due to:

Answers Choices:

primary succession

secondary succession

climax community

camouflage

Questions 16 of 50

Question:The most important organisms for a biosystem are:

Answers Choices:

herbivores

carnivores

green plants

protozoa

Questions 17 of 50

Question:Maximum number in pond ecosystem is of:

Answers Choices:

producers

consumers

top consumers

decomposers

Questions 18 of 50

Question:In every ecosystem, the green plants are:

Answers Choices:

decomposers

producers

consumers

none of above

Questions 19 of 50

Question:A food chain starts with:

Answers Choices:

Decay

Nitrogen fixation

Photosynthesis

Respiration

Questions 20 of 50

Question:Movement of energy and nutrients from one feeding group of organisms to another in a series is called:

Answers Choices:

Trophic level

Food chain

Food link

None of these

Questions 21 of 50

Question:10% law of energy transfer in food chain was given by:

Answers Choices:

Tansley

Weismann

Lindeman

Stanley

Questions 22 of 50

Question:The food chain in which micro-organisms break down the energy-rich compounds syn­thesized by the producer is:

Answers Choices:

detritus food chain

predator food chain

consumer food chain

parasitic food chain

Questions 23 of 50

Question:Interlocking of food chains results in:

Answers Choices:

ecological pyramid

food link

food lock

food web

Questions 24 of 50

Question:In a food chain, as we go from lower to higher trophic level, the energy:

Answers Choices:

becomes doubled at each step

increases irregularly

remains constant

decreases

Questions 25 of 50

Question:The pyramid of numbers deals with the number of:

Answers Choices:

species in a given area

sub-species in a community

individuals in a community

individuals in a trophic level

Questions 26 of 50

Question:In a lake ecosystem, pyramid of biomass is:

Answers Choices:

upright

inverted

anything is possible

none is correct

Questions 27 of 50

Question:Graphic representation of biomass relationship between the producer and consumer in an ecosystem is called:

Answers Choices:

ecological system

trophic levels

ecological niche

ecological pyramid

Questions 28 of 50

Question:Temperate evergreen forests are found in:

Answers Choices:

Himalayan ranges

Western ghats

Arawali ranges

Assam

Questions 29 of 50

Question:Broad-leaved deciduous forests are typical of:

Answers Choices:

monsoon region

mid-latitude forests

mediterranean region

coniferous forests

Questions 30 of 50

Question:Forest floors in general support a wide variety of arthropods. The predominant forms closely asso­ciated with forest litters are the:

Answers Choices:

insects

ants

mites

spiders

Questions 31 of 50

Question:Desert can be converted into grassland by:

Answers Choices:

oxylophytes

psammophytes

halophytcs

tropical trees

Questions 32 of 50

Question:Which type of forest is found near equator?

Answers Choices:

coniferous forests

grassland

deciduous forests

tropical forests

Questions 33 of 50

Question:Plants growing in saline soil water are called:

Answers Choices:

Halophytes

Psammophytes

Lithiphytes

Mesophytes

Questions 34 of 50

Question:Plants of salty seashore wetlands are called:

Answers Choices:

Heliophytes

Halophytes

Saprophytes

Hydrophytes

Questions 35 of 50

Question:235.Cycling of elements in an ecosystem is called:

Answers Choices:

chemical cycle

geochemical cycle

biogeochemical cycle

geological cycle

Questions 36 of 50

Question:236.Which of the following cycles would be affected if decomposers of an ecosystem vanish?

Answers Choices:

Producer's cycle

Consumer's cycle

Decomposer's cycle

Biogeochemical cycle

Questions 37 of 50

Question:Which of the following is a rich source of energy but never causes atmospheric pollution?

Answers Choices:

Solar energy

Nuclear energy

Coal

Wood

Questions 38 of 50

Question:The most important natural resource of energy is:

Answers Choices:

Fossil fuels

Electricity

Biogas

Atomic energy

Questions 39 of 50

Question:If the rate of addition of new species increases with respect to the individual loss of the same population, then the graph obtained has:

Answers Choices:

declined growth

zero population growth

exponential growth

none of these

Questions 40 of 50

Question:When population reaches carrying capacity:

Answers Choices:

Mortality rate = Birth rate

Mortality rate > Birth rate

Mortality rate < Birth rate

None of above

Questions 41 of 50

Question:If phytoplanktons are destroyed from sea. then:

Answers Choices:

algae will get more space to grow

primary consumers will grow luxuriantly

food chain will be affected

no effect will be seen

Questions 42 of 50

Question:Which of the following communities is more vulnerable to invasion by outside animals and plants?

Answers Choices:

Mangroves

Oceanic island communities

Temperate forest

Tropical evergreen forest

Questions 43 of 50

Question:Moderate rainfall during summer produces:

Answers Choices:

grasslands

desert

deciduous forests

shrub forests

Questions 44 of 50

Question:The response of different organisms to the environmental rhythms of light and darkness is called:

Answers Choices:

vernalization

phototropism

photoperiodism

phototaxis

Questions 45 of 50

Question:The transfer of energy from organisms to organisms in a natural community establishes:

Answers Choices:

natural barriers

food chains

biological control

all of the above

Questions 46 of 50

Question:The energy sources for omnivores are:

Answers Choices:

primary producers and primary consumers

primary consumers and secondary con­summers

primary producers, carnivores and decom­posers

primary producers and consumers and car­nivores

Questions 47 of 50

Question:Atmosphere consists of:

Answers Choices:

lithosphere + hydrosphere + ozonosphere

lithosphere + stratosphere + hydrosphere

trophosphere + stratosphere + mesosphere

none of these

Questions 48 of 50

Question:Savannah is characteristic of:

Answers Choices:

USA

India

Former USSR

Australia

Questions 49 of 50

Question:Animals like cockroaches, lizards and mice share the building of human dwellings. Such animals are caned:

Answers Choices:

humus

cultigens

inquilines

pelagice

Questions 50 of 50

Question:The World Environment Day is observed on:

Answers Choices:

5th June

5th May

15th June

15th May