12th Biology

Solved MCQs Ecosystem Unit 25 Fsc Biology 2nd Year

unit 25 biology fsc

Solved MCQs Ecosystem unit 25 Fsc Biology part 2. All MCQs are from previous Board papers 2014 to 2018. 2nd Year Biology chapter 25 short questions and long questions.

Solved MCQs Ecosystem Unit 25

(From Previous Board Papers 2014-2015-2016-2017-2018)
Eton defined the Niche as the species: (DGK. GII, 2016)
(A) Behavior
(B) Address
(C) Pole
(D) Habitat

The actual location of place, where an organism lives is called its: (BWP. GI, 2016)
(A) Niche
(B) Environment
(C) Habitat
(D) Ecosystem

Any group of interbreeding organisms of the same species that exist together in both time
and space is called: (RWP. GI, 2016)
(A) Gene pool
(B) Population
(C) True breeders
(D) Multiple Alleles

Biome is a: (LHR. GI, 2014)(RWP. 2018)
(A) Simple Community
(B) Complex Community
C) Regional Community
(D) Climax Community

In 1917, the term Niche was first proposed by American Ornithologist named: (LHR. GII, GRW. G1.2014,(SWL. 2018)
(A) Charles Eltarf
(B) Joseph Grinnell
(C) Ernst Haeckel
(D) Lamarck

Study of a single population’s relationship to its environment is called: (SGD. GI, 2014)(AJK: GI, 2015/(AJK. 2018)
A) Autecology
(B) Synecology
(C) Niche
(D) Predation

A localized group of individuals belonging to the same species is called as: (MLN. GI, 2015)
(A) Community
(B) Population
(C) Ecosystem
(D) Biosphere

The whole of the world land is called: (RWP. GI, BWP. GI, 2017)
(A) Lithosphere
(B) Ecosphere
(C) Hydrosphere
(D) Biosphere

The basic functional unit of ecology is: (SGD. GI, 2017)
(A) Niche
(B) Population
(C) Ecosystem
(D) Community

The abiotic component of an ecosystem is: (SWL. GI, 2014)
(A) Temperature
(B) Producer
(C) Consumer
(D) Decomposer

All the food chains and food webs begin with: (DGK. GII, 2014)(BWP. 2018)
(A) Primary Consumers
(B) Secondary Consumers
(C) Decomposers
(D) Producers

Lithosphere includes: (BWP. GI, 2015)
(A) Earth Soil
(B) Air
(C) Water
(D) Gases

The living organisms producing their own food: (FBD. GI, 2017)
(A) Heterotrophis
(B) Consumers
(C) Green plants
(D) Decomposers

xerosere, polytrichum and tortula represent: (LHR. GI, 2016)
(A) Herbaceous (plant) stage
(B) Moss stage
(C) Foliage lichen stage
(D) Crustose lichen stage

Herbaceous stage in xerosere is the: (MLN. GI, 2016)
(B) Third stage
(C) Fourth stage
(D) Last stage

Solved MCQs Ecosystem Unit 25

The stage in which Lichens are just like crumpled leaves attached to one point: (DGK GI, 2014
(A) Crustose Lichen stage
(B) Foliage Lichen stage
(C) Shrub Stage

In each case, succession is initiated by a few hardy invaders called: (GRW, GII, 2015)
(A) Starters
(B) Pioneers
(C) Climax Community
(D) Decomposers

Lichens are an example of:
(A) Parasitism
(B) Mutualism
(C) Predation
(D) Commensalism

The relationship between insects and Nowering plants is the example of: (DGR. GI. 2016#BUP.2618.
(A) Parasitism
(B) Predation
C) Mutualism
(D) Commensalism

If the population of predator increase then the population of pres: (RWP.GI.2018)
(A) Increases
B) Decreases
(C) May increase
(D) Has no effect or decrease

The animal that is caught and eaten is called: (GRW.GI. 2016)
(A) Parasite
(B) Predator
(C) Prey

The remoras benefit from this relationship the shark is not affected at all:
(A) Symbiosis
(B) Mycorrhiza
(C) Commensalism
(D) Mutualism

Symbiotic association of an alga living within fungus mycelium is known as: (SGD. GI, 2014)
(A) Mycorrhiza
(B) Lichen
(C) Root Nodules
(D) Parasitism

Moderate grazing is very helpful to maintain ecosystem: (RWP. GI.2014)
(A) Desert
(B) Tundra
(C) Grass Land
(D) Pond

Diseases in living organisms caused by parasites are called: (FBD.GI, BWP. GI, 2014)(FBD. GI. 2015)
A) Infection
(B) Endoparasites
(C) Disinfestation
(D) Ectoparasites

One of the following is an example of the predator-prey relationship: (LHR. G1, 2015)
(A) Fungus and alga
(B) Flower and Insect
(C) Fox and Rabbit
(D) Root Nodule Bacteria

The bacteria in the root nodules fix nitrogen and convert it into: (L. IR. GII, 2015)
(A) Nitrate
(B) Nitrite
(C) Amino Acid
(D) Ammonia

The distinct levels of the food chain are called: (SWL. GI, 2017)
(A) Food chain
(B) Food web
(C) Trophic level
(D) Energy Pyramid

Soil erosion, Fire, and Water percolation down through the soil cause loss of: (MLN. GI. 2014)
(A) Sulphates
(B) Carbonates
(C) Nitrates
(D) Phosphates

When bacteria in soil oxidize ammonia or ammonium ion is called: (SGD. GI. 2015XFBD. GI. 2016XDGK. 2013)
(A) Oxidation
(B) Denitrification
(C) Ammonification
D) Nitrification

The process in which microorganisms use the proteins and amino acids and release
ammonia or ammonium ions is known as: (DGK. GI, 2015)
(A) Nitrification
(B) Ammonification
C) Denitrification
(D) Assimilation

The total energy of the sun, trapped by the producer in an ecosystem is about: (GRW.GI, 2015)(AJK. GI. 2016)
(A) 20%
(B) 10%
(C) 05%
(D 01%

The term niche was first proposed by Joseph Grinnell an American: (LHR. GII, 2018)
(A) Embryologist
(B) Ecologist
(C) Ornithologist
(D) Physiologist

The study of different communities with relation to the environment is called: (FSO, 2018)
(A) evaporation
(B) Synecology
(C) Autecology
(D) Embryology

Primary succession may start in dry soil or rock is called: (MEX, 20185
(A) Hydrosere
(B) Xerosere
(C) Desert
(D) Derosere

Ecosystem Chapter 25 Important short Questions:

What is Grazing?
Define Commensalism.?
What are Lichens?
Differentiate between Root Nodules and Mycorrhiza.
Define Niche.
What is Biosphere.?
What are Decomposers?

Long Questions:

What do you know about autecology and synecology? Are they important to survive in the biome?
Define succession. Discuss succession on land.

Useful Resources:

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