# Organism and the Environment Test 4

Total Questions:50 Total Time: 75 Min

Remaining:

## Questions 1 of 50

Question:Synecology is the study of

community in relation to environment

water

individuals

environment

## Questions 2 of 50

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

Schroter and Kirchner

A.. Tansley

Karl Mobius

Alexander von Humboldt

## Questions 3 of 50

Question:'Biocenosis' is the study of:

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:

Phototaxis

Phototropism

Photoperiodism

All of these

## Questions 5 of 50

Question:Light has a significant effect on:

Vision

Metabolism

Locomotion

Reproduction

## Questions 6 of 50

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

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:

Euryhaline

Stenohaline

Poikilotherms

## Questions 8 of 50

Question:Euryhaline species denotes an animal:

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:

Topographic

Edaphic

Biotic

Temperature.

## Questions 10 of 50

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

$${{\rm{N}}_{\rm{2}}}$$

Ca

Mg

Water

## Questions 11 of 50

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

lithophytes

halophytes

mesophytes

hydrophytes

## Questions 12 of 50

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

Humidity

Rainfall

Snowfall

Substratum

## Questions 13 of 50

Question:A place where a plant or animal lives:

Habitat

Niche

Biome

Ecosystem

## Questions 14 of 50

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

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:

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:

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

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:

Soil

Fungi

Lichens

Virus

## Questions 19 of 50

Question:The term ecosystem was coined by:

Odum

Ernst Haeckel

Tansley

Reiter

## Questions 20 of 50

Question:Ecosystem contains:

producers

consumers

decomposers

all of the above

## Questions 21 of 50

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

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:

decomposer

producer

consumer

transformer

## Questions 23 of 50

Question:The major functional components of an ecosys­tem are:

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:

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:

Primary production

Secondary production

Gross production

None of the above

## Questions 26 of 50

Question:An ecosystem is a complex interacting system of:

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?

Biosphere

Biome

Biomass

Ecosystem

## Questions 28 of 50

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

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:

Savanna

Steppes

Chaparral

Deciduous forest

## Questions 30 of 50

Question:Mediterranian shrub forest is called as:

Taiga

Chaparral

Tundra

Savanna

## Questions 31 of 50

Question:What is plankton?

sea scum

floating vegetation

layer of aquatics

floating microscopic plants and animals

## Questions 32 of 50

Question:Upper part of sea water mainly contains:

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:

Ecotone

Thermocline

Biome

Ecotype

## Questions 34 of 50

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

Lithosphere

Biosphere

Atmosphere

Hydrosphere

## Questions 35 of 50

Question:Maximum contribution of oxygen is from:

Grasslands

Phytoplankton

Dense forests

Herbs and shrubs

## Questions 36 of 50

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

Hydrologic cycle

Mineral cycle

Humidity cycle

Biogeochemical cycle

## Questions 37 of 50

Question:Animals with ant-eating habits are called:

Sanguivorous

Myrmecophagous

Carnivorous

Insectivorous

## Questions 38 of 50

Question:Select the statement which is NOT true:

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

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:

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:

$${{\rm{T}}_{\rm{1}}}$$

$${{\rm{T}}_{\rm{2}}}$$

$${{\rm{T}}_{\rm{3}}}$$

$${{\rm{T}}_{\rm{4}}}$$

## Questions 42 of 50

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

available food

predators

parasites

man

## Questions 43 of 50

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

Ecotone

Biosphere

Biome

Biota

## Questions 44 of 50

Question:Decomposers are:

autotrophs

heterotrophs

autoheterotrophs

organotropic

## Questions 45 of 50

Question:Territoriality occurs as a result of:

predation

competition

co-operation

parasitism

## Questions 46 of 50

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

parasites

dimorphic

saprophytes

none of these

## Questions 47 of 50

Question:The treeless biomes include:

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:

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:

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)