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The phenomenon whereby some organisms with certain features get established in an environment is known as
Apartial selection
Bartificial selection
Cnatural selection
Dmutation
Ecolonization
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Question 2052
waec1991
which of the following statements best explains the term aestivation?
Aa device for survival during a period of extreme food and water shortage
BA method of survival adopted by plants during dry season
CMovement of animals over long distance
DA method of survival adopted by animals under favourable condition
EA device for rapid multiplication during abundance of food
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Question 2053
waec1991
Which of the following structures is a protective adaptive feature of the Agama lizard to terrestrial habitat?
AClaws
BGular fold
CScaly skin
DNuchal crest
Etail
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Question 2054
waec1991
The adaptation for water conservation in organisms include the following except
Ascales in fishes
Bscales on leaves
Cthick leaves
Dspine in plants
Esucculent stem
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Question 2055
waec1991
Which of the following limiting resources is competed for by organism in the desert?
ALight
BTemperature
COxygen
Dwater
ECarbondioxide
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Question 2056
waec1991
Which of the following is not a way of conserving natural resources?
Acontrolling farming practice
BEstablishing forest reserve
CEstablishing of parks and gardens
DEncouraging poaching in game reserve
Eprotecting endangered species
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Question 2057
waec1991
Agglutination occurs in blood transfusion when the
Adonor and the recipient belong to the same blood group
Bsame antibodies from donor and recipient fuse together
Cdonor and the recipient belong to different race
Drecipient is not a universal recipient
Eantigens and anitbody in the donor and the recipient react
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Question 2058
waec1991
The practice of warming soup regularly as it concerns food preservation is essentially to
Aretain the taste
Bhelp to break down cellulose
Cremove excess water
Dkill the bacteria in it
Eraise the temperature
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Question 2059
waec1991
I.Plasmodium II. Vibro Choleroe III. Gonococcus sp IV. Poliomyelitis virus V. Syphilis bacteria
which of the following organism are transmitted by houseflies?
AI and II only
BII and V only
CIII and IV only
DII and IV only
EIII and V only
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Question 2060
waec1991
Predators are beneficial in pest control because they
Aare natural enemies of small mammals
Bdevour farm animals
Cfeed on pests of crops
Dprey on game animal
Ecompete for food with the pests
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Question 2061
waec1991
Succession is best described as
Aa process whereby organisms systematically colonize a barren habitat until stable community is formed
Ba process whereby plant occupy a barren habitat until a suitable habitat is formed
Ca process whereby animals occupy a barren habitat until a suitable habitat is formed
Dthe subsequent taking over of the land through emigration or dispersal of seeds
Ethe replacement of weaker plants and animals by stronger ones
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Question 2062
waec1991
Which of the following may not contribute to environmental pollution?
ASolar energy radiation
BIndustrial waste
CWaste disposal
DSmoke
ENuclear power plant
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Question 2063
waec1991
Species do not change in order to survive. The environment determines which organism survives to reproduce. These statements
Aexplains theory of acquired characters
Bsupports Jean Lamarck's theory of use and disuse
Csupport the idea of survival of the fittest
Dare refuted by fossil record
Eimply that organisms modify their environment in order to survive
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Question 2064
waec1991
The role of dead organic matter in the soil is to
Amake the soil black
Bincrease the mineral salt content
Cprovide food for all living organisms
Dincrease the acidity of soil
Emake the soil more porous
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Question 2065
waec1991
Which of the following is the unit of transmission of hereditary traits in living organisms
ANucleus
BNucleolus
CGametes
DGenes
EChromosomes
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Question 2066
waec1991
which of the following will be the effect of waterlogged top soil on the roots of plants?
Athe waterlogged soil will stimulate rapid growth of roots
Bthere will be abundant supply of air for the growth of roots
CThe roots will absorb water i rapidly
DThere willl be an accumulation of plant nutrients
Ethe roots will be starved of air
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Question 2067
waec1991
The number of individuals in a habitat in relation to the unit space available to each organism is referred to as the
Abirth rate
Bdensity
Cmortality
Dfrequency
Edispersion
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Question 2068
waec1991
fewer number of trees is characteristic of the Savanna zones of Nigeria because
Athere is too much sunlight
Bthere is limited amount of rainfall
Cthey are usually exposed to grazing animals
Dthey are covered by high mountains
Ethe farmers always engage in bush-burning
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Question 2069
waec1991
Which of the following would be the primary producer in a food chain?
ASaprophytes
BHerbivores
CCarnivores
DGreen plants
EParasites
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Question 2070
waec1991
Puddles,ponds, rivers, lakes, seas and ocean are grouped together as
