# Organism and the Environment Test 3

Total Questions:50 Total Time: 75 Min

Remaining:

## Questions 1 of 50

Question:Autecology refers to the study of the ecology of:

community

a species

animal population

an individual

## Questions 2 of 50

Question:The study of an entire community in relation to its environment is called:

Autecology

Synecology

Resource ecology

Space ecology

## Questions 3 of 50

Question:Which of the following habitats would be ideally suited to sciophytes?

ponds and lakes

dry and sunny place

desert

## Questions 4 of 50

Question:Which of the following habitats is most unsuitable for primary productivity?

Pond

Forest river bank

Cave

## Questions 5 of 50

Question:Eurythermal plants and animals are those:

which cannot tolerate any change in temperature

which can tolerate only small variation in temperature

which can tolerate large variation in temperature

which are not affected by temperature

## Questions 6 of 50

Question:The factor most important for living organisms is:

Water

Temperature

Humidity

Light

## Questions 7 of 50

Question:Humus is:

totally decomposed organic matter in the soil

partially decomposed organic matter in the soil

totally decomposed organic matter in a pond

partially decomposed organic matter in a pond

## Questions 8 of 50

Question:Humus is an example of:

crystalloids

soil structure

organic colloids

none of them

## Questions 9 of 50

Question:The "niche" of a species is meant for:

the specific place where an organism lives

the specific function of a species and its competitive power

the habitat and specific functions of a species

none of these

## Questions 10 of 50

Question:Both the zebra and African lion live in the tropical grasslands but occupy different:

biospheres

environments

ecological niches

habitats

## Questions 11 of 50

Question:A sucker fish (Remora) on a shark would examplify:

Parasitism

Commensalism

Mutualism

Neutralism

## Questions 12 of 50

Question:In commensalism:

both partners are benefited

both partners are harmed

weaker partner is benefited

none of the partners is benefited

## Questions 13 of 50

Question:Last stabilized community in plant succession is called:

Serai community

Ecotone

Ecosere

Climax community

## Questions 14 of 50

Question:One of the following is pioneer of vegetation:

Lichens

Algae

Fungi

Bryophytes

## Questions 15 of 50

Question:The number of primary producers within a specified area would be maximum in:

Desert

Forest ecosystem

Grassland ecosystem

Pond ecosystem

## Questions 16 of 50

Question:Phytoplanktons are:

producers of forest

producers of lake

consumers of sea

decomposers of land

## Questions 17 of 50

Question:Food chain is:

transfer of food energy from producers to consumers

a number of human beings forming a chain for food

animals near a source of food

none of the above

## Questions 18 of 50

Question:Which of the following is the correct sequence in the food chain?

grass—wolf—deer—buffalo

grass—snake—insect—deer

grass—insect—bird—snake

bacteria—grass—rabbit—wolf

## Questions 19 of 50

Question:Which of the following food-chains is correct?

grasses—chameleon—insects—birds

fallen leaves—bacteria—insect—birds

grasses—fox—rabbit

phytoplankton—zooplankton—fish

## Questions 20 of 50

Question:When man eats fish, which feeds on zooplankton, which have eaten small plants, the producer in the chain is:

Fish

Small plants

Zooplankton

Man

## Questions 21 of 50

Question:The pyramid of energy is always:

inverted

upright

both upright and inverted

inverted in forest ecosystem

## Questions 22 of 50

Question:The pyramid of number of individuals per unit area in a grassland ecosystem will be:

linear

inverted

upright

irregular

## Questions 23 of 50

Question:Conifers are found in:

Rajasthan

Western Ghats

Eastern Ghats

Eastern and Western Himalayas

## Questions 24 of 50

Question:Vegetation consists of broad-leafed evergreen shrubs found in regions of Mediterranean:

Tundra

Savanna

Chaparral

Desert

## Questions 25 of 50

Question:Mangrove vegetation is found in:

Kullu valley

Western Ghats

Sunderbans

## Questions 26 of 50

Question:Which of the following is the most stable ecosystem?

Mountain

Desert

Forest

Ocean

## Questions 27 of 50

Question:Small, floating or weakly swimming plants and animals in fresh water and marine ecosystem are termed:

Nekton

Benthos

Plankton

All of these

## Questions 28 of 50

Question:Plants that grow in a marshy saline habitat are called:

Hydrophytes

Mesophytes

Mangroves

Xerophytes

## Questions 29 of 50

Question:Gradual change in population characteristics over a geographical area associated with change in environment is:

Clone

Cline

Chyle

Chyme

## Questions 30 of 50

Question:When the two ecosystems overlap each other the area is called:

Niche

Ecotone

Ecotypes

Edge effect

## Questions 31 of 50

Question:237.Which of the following contribute to the carbon cycle?

Respiration

Fossil fuel burning

Photosynthesis

All of these

## Questions 32 of 50

Question:238.Which of the following is the logical sequence Of carbon cycle?

consumer—decomposer

Photosynthesis—decomposer—consumer

Consumer—photosynthesis—decomposer

Decomposer—photosynthesis—consumer

## Questions 33 of 50

Question:239. Which of the following is the source of carbon to plants?

Fossil fuels

$${\rm{C}}{{\rm{O}}_{\rm{2}}}$$ of carbonate rocks

Atmospheric $${\rm{C}}{{\rm{O}}_{\rm{2}}}$$

All of the above

## Questions 34 of 50

Question:A depleting source of energy is:

Wind

Water

Fossil fuel

Sunlight

## Questions 35 of 50

Question:Which is the best source of renewable energy?

Coal

Trees (Biomass)

Catties

Petroleum

## Questions 36 of 50

Question:All populations in a given physical area are defined as:

Population

Ecosystem

Biotic community

Territory

## Questions 37 of 50

Question:Which of the following factors is NOT con­cerned with population regulation in animals?

Territorialism

Hierarchy contest

Threatening displays

Hibernation

## Questions 38 of 50

Question:A group of individuals of the same age within a population is called:

Clone

Cohort

Cline

Community

## Questions 39 of 50

Question:The proportion of young individuals is highest in:

expanding population

declining population

stable population

both stable and declining population

## Questions 40 of 50

Question:Which type of animals are relatively more abundant in desert grassland?

Fossorial

Arboreal

Diurnal

Aquatic

## Questions 41 of 50

Question:The rate at which light energy is converted into chemical energy of organic molecules is the ecosystem's:

net primary productivity

gross primary productivity

net secondary productivity

gross secondary productivity

## Questions 42 of 50

Question:The main role of bacteria in the carbon cycle involves:

photosynthesis

chemosynthesis

assimilation of nitrogenous compounds

digestion or breakdown of organic com­pounds

## Questions 43 of 50

Question:Plant (2) Rabbit (3) Fox and (4) Lion are the components of a food chain. In this food chain, the maximum energy will be found in:

3

4

2

1

## Questions 44 of 50

Question:Each couple should produce only two children which will help in:

stabilizing the ecosystem

checking pollution

improving food-web

increasing fertility of soil

## Questions 45 of 50

Question:The trophic level of lion in a forest ecosystem is:

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

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

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

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

## Questions 46 of 50

Question:The zooplanktonic forms are:

primary consumers

secondary consumers

primary producers

carnivores

## Questions 47 of 50

Question:Food chains are met only in the:

sea

forests

deserts

in all of these places

## Questions 48 of 50

Question:Group of organisms of the same species in a given area at a particular time is called as:

genera

ecosystem

population

community

## Questions 49 of 50

Question:In biotic community, which one of the follow­ing is a protective device?

Mimicry

Symbiosis

Commensalism

Parasitism

## Questions 50 of 50

Question:In a biotic community, the primary consumers are: