Organism and the Environment Test 5

Total Questions:50 Total Time: 75 Min

Remaining:

 

Questions 1 of 50

Question:The term 'biocenosis' was proposed by:

Answers Choices:

Tansley

Warming

Karl Mobius

None of the above

Questions 2 of 50

Question:Branch of botany dealing with distribution of plants on earth's surface is called:

Answers Choices:

Ecology

Phytosociology

Phytology

Phytogeography

Questions 3 of 50

Question:Plants growing in extreme cold soil are:

Answers Choices:

Oxylophytes

Halophytes

Psychrophytes

Psammophytes

Questions 4 of 50

Question:Which of the following pairs belong to the category of cold blooded animals?

Answers Choices:

Frogs and snakes

Lizards and rats

Snakes and birds

Birds and monkeys

Questions 5 of 50

Question:Edaphic factors are related to:

Answers Choices:

Men

Animals

Temperature

Soil

Questions 6 of 50

Question:Which one of these is an edaphic factor?

Answers Choices:

Wind

Rainfall

Soil

Light

Questions 7 of 50

Question:Plants can make use of only capillary water because:

Answers Choices:

it has dissolved minerals

it has dissolved oxygen

it is present in all types of soil

none of the above

Questions 8 of 50

Question:Water holding capacity of soil depends upon:

Answers Choices:

size of its particles

amount of organic matter

type of parent rock

type of organisms

Questions 9 of 50

Question:The area protected by the animals against intruders:

Answers Choices:

Home range

Niche

Ecotone .

Territory

Questions 10 of 50

Question:Total surrounding of an organism including other plants and animals and those of its own kind is known as:

Answers Choices:

Environment

Niche

Biosphere

All of these

Questions 11 of 50

Question:Which of the following take part in symbiosis of lichen?

Answers Choices:

Alga-fungi

Alga-alga

Fungi-fungi

Alga-gymnosperm

Questions 12 of 50

Question:Mycorrhiza is:

Answers Choices:

a fungus parasiting root system of higer plants

a symbiotic association of plant roots and certain fungi

an association of algae with fungi

an association of Rhizobium with roots of leguminous plants

Questions 13 of 50

Question:Keystone species in an ecosystem are those:

Answers Choices:

present in maximum number

that are most frequent

attaining large biomass

contributing to ecosystem properties

Questions 14 of 50

Question:Which of the following ecosystem has highest gross primary productivity?

Answers Choices:

Grasslands

Coral reefs

Mangroves

Rain forests

Questions 15 of 50

Question:An ecosystem is:

Answers Choices:

a community of organisms interacting with one another

the abiotic component of an area

that part of earth and its atmosphere where living organisms exist

a community of organisms together with the environment in which they live

Questions 16 of 50

Question:A large number of organic compounds can be decomposed by:

Answers Choices:

Pseudomonas

Azotobacter

Mycoplasma

Chemolithotrophs

Questions 17 of 50

Question:If we completely remove the decomposers from an ecosystem, the ecosystem functioning will be adversely affected because:

Answers Choices:

energy flow will be blocked

rate of decomposition of other components will be very high

herbivore will not receive solar energy

mineral movement will be blocked

Questions 18 of 50

Question:An organism that feeds on dead organic matter other than bacteria or fungi is called:

Answers Choices:

decomposer

detritivore

producer

consumer

Questions 19 of 50

Question:Importance of ecosystem lies in:

Answers Choices:

cycling of materials

flow of energy

both the above

none of the above

Questions 20 of 50

Question:In a tiger reserve, the tiger is placed in the:

Answers Choices:

centre of complex food-web

apex of the food chain

bottom of the food chain

core of the reserve forest

Questions 21 of 50

Question:In a food-chain, lion is a:

Answers Choices:

secondary consumer

primary consumer

tertiary consumer

secondary producer

Questions 22 of 50

Question:Which one of the following components of ecosystem comes from outside?

Answers Choices:

Oxygen

Energy

Insects

Temperature

Questions 23 of 50

Question:Biological equilibrium is an equilibrium among the:

Answers Choices:

producers

producers and consumers

producers and decomposers

producers, consumers and decomposers

Questions 24 of 50

Question:In natural ecosystem decomposers include:

Answers Choices:

microscopic organisms only

bacteria only

fungi only

bacteria and fungi

Questions 25 of 50

Question:Largest terrestrial community of an entire geographical belt over which plant and animal species may be found is called:

Answers Choices:

Biome

Habitat

Range

Niche

Questions 26 of 50

Question:What determines the limits of a biome?

Answers Choices:

type of soil and presence of barrier

altitude and latitude

temperature and rainfall

all of the above

Questions 27 of 50

Question:Major communities of the world are:

Answers Choices:

shrubs, jungles and gardens

ocean, freshwater and forest communities

grassland and desert communities

both (2) and (3)

Questions 28 of 50

Question:Savannas are:

Answers Choices:

Tropical rain forests

Desert shrubs

Grassland with scattered trees

Dense forests with closed canopy

Questions 29 of 50

Question:Select the unmatching pair:

Answers Choices:

Prairies — Canada and USA

Pampas — South America

Steppes — Europe and Asia

Veldts — Mexico and North America

Questions 30 of 50

Question:A tropical grassland, usually with scattered trees or shrubs is called:

Answers Choices:

Savanna

Taiga

Tundra

None

Questions 31 of 50

Question:Pelagic forms of animals are found:

Answers Choices:

on the surface of the sea floating along the waves

in deep sea

in the soil

as parasites of mammals

Questions 32 of 50

Question:Organisms capable of swimming and resting on the surface of water are termed:

Answers Choices:

Neuston

Nekton

Plankton

Benthos

Questions 33 of 50

Question:Benthos are:

Answers Choices:

periphyton

zooplankton

epineuston

bottom dwelling primary consumers

Questions 34 of 50

Question:All living organisms on or around the earth constitute:

Answers Choices:

Biome

Community

Biosphere

Ecosystem

Questions 35 of 50

Question:Biosphere is made up of:

Answers Choices:

organisms

organism + lithosphere

organism + lithosphere + atmosphere

organism + lithosphere + atmosphere + hydrosphere

Questions 36 of 50

Question:Biosphere is called as:

Answers Choices:

part of atmosphere where the living beings can live

part of atmosphere where the living beings cannot live

both (1) and (2)

none of these

Questions 37 of 50

Question:The presence of large amount of nitrogen in the atmosphere is due to:

Answers Choices:

Nitrites

Decomposers

Nitrogen cycle

Ammonia

Questions 38 of 50

Question:The phosphorus cycle is unusual in that it is entirely:

Answers Choices:

Gaseous

Sedimentary

Within terrestrial ecosystems

Within aquatic ecosystems

Questions 39 of 50

Question:Which of the following is called as inquiline''

Answers Choices:

Cockroach

Cow

Tiger

Fish

Questions 40 of 50

Question:The bird Dodo became extinct because of:

Answers Choices:

its beautiful feathers

its fearlessness

curved beak

melodious songs

Questions 41 of 50

Question:Circadian rhythm is the metabolic or behavioural rhythm of:

Answers Choices:

24 minutes cycle

24 hours cycle

24 days cycle

24 months cycle

Questions 42 of 50

Question:Law of limiting factors in photosynthesis was given by:

Answers Choices:

Calvin

R. Hip

Blackmann

Arnon

Questions 43 of 50

Question:Name the famous plant ecologist:

Answers Choices:

M.S. Swaminathan

Birbal Sahni

Ramdeva Mishra

Jagdish Chandra Bose

Questions 44 of 50

Question:Different life forms among plants in relation to environment were given by:

Answers Choices:

Odum

Warming

Reiter

Raunkiaer

Questions 45 of 50

Question:Energy enters ecosystem through:

Answers Choices:

decomposers

producers

herbivores

carnivores

Questions 46 of 50

Question:The food chain in which microorganisms break down the energy rich compounds synthesized by producers, is called:

Answers Choices:

ecosystem

predator food chain

detritus food chain

parasitic food chain

Questions 47 of 50

Question:The correct sequence of food chain is:

Answers Choices:

grass \( \to \) insect \( \to \) birds \( \to \) snake

grass \( \to \) wolf \( \to \) deer \( \to \)buffalo

grass \( \to \) snake \( \to \) insect \( \to \) deer

bacteria \( \to \) grass \( \to \) rabbit \( \to \) wolf

Questions 48 of 50

Question:The phenomenon which one species inhibits the growth of another species is called:

Answers Choices:

predation

amensalism

parasitism

commensalism

Questions 49 of 50

Question:The relationship between two organisms in which one obtains some benefit at the expense of the other is called:

Answers Choices:

symbiosis

scavenging

parasitism

commensalism

Questions 50 of 50

Question:An interaction between two individuals where one is benefited while the other is neither benefited nor harmed is called as:

Answers Choices:

predation

symbiosis

parasitism

commensalism