Organism and the Environment Test 4

Total Questions:50 Total Time: 75 Min

Remaining:

 

Questions 1 of 50

Question:Synecology is the study of

Answers Choices:

community in relation to environment

water

individuals

environment

Questions 2 of 50

Question:Who gave the terms 'Autecology' and 'Synecology'?

Answers Choices:

Schroter and Kirchner

A.. Tansley

Karl Mobius

Alexander von Humboldt

Questions 3 of 50

Question:'Biocenosis' is the study of:

Answers Choices:

living

environment

interaction between living and non-living

none of these

Questions 4 of 50

Question:When an animal moves towards the source of light, it is called:

Answers Choices:

Phototaxis

Phototropism

Photoperiodism

All of these

Questions 5 of 50

Question:Light has a significant effect on:

Answers Choices:

Vision

Metabolism

Locomotion

Reproduction

Questions 6 of 50

Question:Temperature changes in the environment affect most of the animals which are:

Answers Choices:

Poikiloderma

Homoiotherma

Aquatic

Desert living

Questions 7 of 50

Question:Aquatic animals which can tolerate only a narrow range of salinity are said to be:

Answers Choices:

Euryhaline

Stenohaline

Poikilotherms

Catadromous

Questions 8 of 50

Question:Euryhaline species denotes an animal:

Answers Choices:

without osmoregulation

which lives in saline water

which has a wide range of saline tolerance

which has a wide range of temperature tolerance

Questions 9 of 50

Question:The factor governing the structure of earth's surface is:

Answers Choices:

Topographic

Edaphic

Biotic

Temperature.

Questions 10 of 50

Question:Insectivorous plants grow in soil which is deficient in:

Answers Choices:

\({{\rm{N}}_{\rm{2}}}\)

Ca

Mg

Water

Questions 11 of 50

Question:The plants which live on saline soil are known as:

Answers Choices:

lithophytes

halophytes

mesophytes

hydrophytes

Questions 12 of 50

Question:Which of the following is NOT a climatic factor?

Answers Choices:

Humidity

Rainfall

Snowfall

Substratum

Questions 13 of 50

Question:A place where a plant or animal lives:

Answers Choices:

Habitat

Niche

Biome

Ecosystem

Questions 14 of 50

Question:Competition for nutrients, food, light and space is more severe between two:

Answers Choices:

unrelated species occupying different niches

unrelated species occupying the same niche

closely related species occupying the same niche

closely related species occupying different niches

Questions 15 of 50

Question:The area over which animals move in search of food is called:

Answers Choices:

Territory

Niche

Ecotone

Home range

Questions 16 of 50

Question:An association between two different organ­isms in which one is always benefited while the other remains unharmed is:

Answers Choices:

Symbiosis

Mutualism

Succession

Commensalism

Questions 17 of 50

Question:Study the following statements about Adamsia and select your answer from the answer code:1. It is a parasite 2. It is an example of commensalism 3. It is called sea anemone 4. It is called hermit crab Answer code

Answers Choices:

1 and 2 are correct

2 and 3 are correct

3 and 4 are correct

1 and 4 are correct

Questions 18 of 50

Question:Symbiosis is expressed by:

Answers Choices:

Soil

Fungi

Lichens

Virus

Questions 19 of 50

Question:The term ecosystem was coined by:

Answers Choices:

Odum

Ernst Haeckel

Tansley

Reiter

Questions 20 of 50

Question:Ecosystem contains:

Answers Choices:

producers

consumers

decomposers

all of the above

Questions 21 of 50

Question:In an ecosystem, the function of the producers is to:

Answers Choices:

utilise chemical energy

release energy

convert organic compounds into inorganic compounds

trap solar energy and convert it into chemical energy

Questions 22 of 50

Question:An organism that obtains energy from the breakdown of dead organic matter:

Answers Choices:

decomposer

producer

consumer

transformer

Questions 23 of 50

Question:The major functional components of an ecosys­tem are:

Answers Choices:

energy flow and food chain

food chain and decomposers

mineral recycling and energy flow

energy flow and decomposers

Questions 24 of 50

Question:Ecosystem creates:

Answers Choices:

Food chain

Food web

Both the above

None of the above

Questions 25 of 50

Question:The total energy fixed by a green plant of an ecosystem on the whole is called:

Answers Choices:

Primary production

Secondary production

Gross production

None of the above

Questions 26 of 50

Question:An ecosystem is a complex interacting system of:

Answers Choices:

Populations

Individuals

Communities and their soil conditions

Communities and their physical environ­ment

Questions 27 of 50

Question:Which of the following is the largest terrestrial community?

Answers Choices:

Biosphere

Biome

Biomass

Ecosystem

Questions 28 of 50

Question:The pyramid of numbers of a parasitic food chain in a forest ecosystem is:

Answers Choices:

always upright

always inverted

mixture of inverted and upright

sometimes inverted and sometimes upright

Questions 29 of 50

Question:The biome which is characterised by broad-leafed vegetation, fire-resistant resinous plants and drought-evading plants is known as:

Answers Choices:

Savanna

Steppes

Chaparral

Deciduous forest

Questions 30 of 50

Question:Mediterranian shrub forest is called as:

Answers Choices:

Taiga

Chaparral

Tundra

Savanna

Questions 31 of 50

Question:What is plankton?

Answers Choices:

sea scum

floating vegetation

layer of aquatics

floating microscopic plants and animals

Questions 32 of 50

Question:Upper part of sea water mainly contains:

Answers Choices:

Nektons

Neustons

Planktons

Nektons and Neustons

Questions 33 of 50

Question:The boundary or transition between two or more communities which are sharply defined is called:

Answers Choices:

Ecotone

Thermocline

Biome

Ecotype

Questions 34 of 50

Question:The part of earth in which life exists is known as:

Answers Choices:

Lithosphere

Biosphere

Atmosphere

Hydrosphere

Questions 35 of 50

Question:Maximum contribution of oxygen is from:

Answers Choices:

Grasslands

Phytoplankton

Dense forests

Herbs and shrubs

Questions 36 of 50

Question:The interchange of water between the earth's surface and atmosphere is:

Answers Choices:

Hydrologic cycle

Mineral cycle

Humidity cycle

Biogeochemical cycle

Questions 37 of 50

Question:Animals with ant-eating habits are called:

Answers Choices:

Sanguivorous

Myrmecophagous

Carnivorous

Insectivorous

Questions 38 of 50

Question:Select the statement which is NOT true:

Answers Choices:

The home range of an animal is larger than its territory.

In the red deer the female is the leader of the herd

Seals, walruses and deer are polygamous

The dominant individual in a herd is always a male.

Questions 39 of 50

Question:Which of the following statements is/are true? 1. a community and its habitat mutually interact 2. a community and its habitat are interdepen­dent 3. a community and its habitat exist inde­pendently

Answers Choices:

1 and 2

1 alone

1 and 3

2 alone

Questions 40 of 50

Question:A bird introduced from one country to another became a serious pest due to:

Answers Choices:

better adaptation to new area

more sexual reproduction

better nesting habits

absence of natural competition

Questions 41 of 50

Question:In a terrestrial ecosystem such as forest, maxi- mum energy is at trophic level:

Answers Choices:

\({{\rm{T}}_{\rm{1}}}\)

\({{\rm{T}}_{\rm{2}}}\)

\({{\rm{T}}_{\rm{3}}}\)

\({{\rm{T}}_{\rm{4}}}\)

Questions 42 of 50

Question:The number of individuals of a species in a particular ecosystem at a given time remains constant due to:

Answers Choices:

available food

predators

parasites

man

Questions 43 of 50

Question:The part of the earth and the atmosphere supporting life is:

Answers Choices:

Ecotone

Biosphere

Biome

Biota

Questions 44 of 50

Question:Decomposers are:

Answers Choices:

autotrophs

heterotrophs

autoheterotrophs

organotropic

Questions 45 of 50

Question:Territoriality occurs as a result of:

Answers Choices:

predation

competition

co-operation

parasitism

Questions 46 of 50

Question:When fungi feed on dead organic matter, they are known as:

Answers Choices:

parasites

dimorphic

saprophytes

none of these

Questions 47 of 50

Question:The treeless biomes include:

Answers Choices:

grassland

tundra

deserts

all of these

Questions 48 of 50

Question:Two different species cannot live for long duration in the same niche or habitat. This law is:

Answers Choices:

Allen's law

Gause's law

Weismann's theory

Competitive exclusion principle

Questions 49 of 50

Question:A bird enters the mouth of crocodile and feed on parasitic leeches. The bird gets food and crocodile gets rid of blood sucking leeches. Both the partners can live independently. Such an association is:

Answers Choices:

amensalism

mutualism

commensalism

protocooperation

Questions 50 of 50

Question:The relationship between two organisms where one receives benefit at the cost of the other is known as: (AFMC 2002)

Answers Choices:

parasitism

scavenging

predation

symbiosis