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Biology WAEC / WASSCE 1991 Basic Ecological Concepts, Ecosystems & Biomes
Succession is best described as
A
a process whereby organisms systematically colonize a barren habitat until stable community is formed
B
a process whereby plant occupy a barren habitat until a suitable habitat is formed
C
a process whereby animals occupy a barren habitat until a suitable habitat is formed
D
the subsequent taking over of the land through emigration or dispersal of seeds
E
the replacement of weaker plants and animals by stronger ones
medium Difficulty
Biology WAEC / WASSCE 1991 Variety of Organisms & Classification of Living Things
Predators are beneficial in pest control because they
A
are natural enemies of small mammals
B
devour farm animals
C
feed on pests of crops
D
prey on game animal
E
compete for food with the pests
medium Difficulty
Biology WAEC / WASSCE 1991 Growth, Micro-organisms & Public Health
I.Plasmodium II. Vibro Choleroe III. Gonococcus sp IV. Poliomyelitis virus V. Syphilis bacteria which of the following organism are transmitted by houseflies?
A
I and II only
B
II and V only
C
III and IV only
D
II and IV only
E
III and V only
medium Difficulty
Biology WAEC / WASSCE 1991 Growth, Micro-organisms & Public Health
The practice of warming soup regularly as it concerns food preservation is essentially to
A
retain the taste
B
help to break down cellulose
C
remove excess water
D
kill the bacteria in it
E
raise the temperature
medium Difficulty
Biology WAEC / WASSCE 1991 Growth, Micro-organisms & Public Health
Agglutination occurs in blood transfusion when the
A
donor and the recipient belong to the same blood group
B
same antibodies from donor and recipient fuse together
C
donor and the recipient belong to different race
D
recipient is not a universal recipient
E
antigens and anitbody in the donor and the recipient react
medium Difficulty
Biology WAEC / WASSCE 1991 Population Ecology, Habitats & Conservation
Which of the following is not a way of conserving natural resources?
A
controlling farming practice
B
Establishing forest reserve
C
Establishing of parks and gardens
D
Encouraging poaching in game reserve
E
protecting endangered species
medium Difficulty
Biology WAEC / WASSCE 1991 Variety of Organisms & Classification of Living Things
Which of the following limiting resources is competed for by organism in the desert?
A
Light
B
Temperature
C
Oxygen
D
water
E
Carbondioxide
medium Difficulty
Biology WAEC / WASSCE 1991 Population Ecology, Habitats & Conservation
The adaptation for water conservation in organisms include the following except
A
scales in fishes
B
scales on leaves
C
thick leaves
D
spine in plants
E
succulent stem
medium Difficulty
Biology WAEC / WASSCE 1991 Basic Ecological Concepts, Ecosystems & Biomes
Which of the following structures is a protective adaptive feature of the Agama lizard to terrestrial habitat?
A
Claws
B
Gular fold
C
Scaly skin
D
Nuchal crest
E
tail
medium Difficulty
Biology WAEC / WASSCE 1991 Adaptation & Evolution
which of the following statements best explains the term aestivation?
A
a device for survival during a period of extreme food and water shortage
B
A method of survival adopted by plants during dry season
C
Movement of animals over long distance
D
A method of survival adopted by animals under favourable condition
E
A device for rapid multiplication during abundance of food
medium Difficulty
Biology WAEC / WASSCE 1991 Variation & Genetics (Heredity)
The phenomenon whereby some organisms with certain features get established in an environment is known as
A
partial selection
B
artificial selection
C
natural selection
D
mutation
E
colonization
medium Difficulty
Biology WAEC / WASSCE 1991 Adaptation & Evolution
who formulated the theory of natural selection in evolution?
A
Louis pasteur
B
Robert Hooke
C
Jean Lamarck
D
Mathias Schlieden
E
Charles Darwin
medium Difficulty
Biology WAEC / WASSCE 1991 Adaptation & Evolution
The wing of a bat and that of a bird, the flippers of a whale and the fins of s fish are example of?
A
adaptive radiation
B
vestigial structures
C
continuous variation
D
convergent evolution
E
divergent evolution
medium Difficulty
Biology WAEC / WASSCE 1991 Variation & Genetics (Heredity)
In an individual who is heterozygous for a particular character, the hereditary factor that is always expressed is described as
A
allele
B
sickle-cell gene
C
dominant gene
D
chromosome
E
sex-linked character
medium Difficulty
Biology WAEC / WASSCE 1991 Variation & Genetics (Heredity)
Which of the following statements best explains the meaning of homologous chromosomes?
A
Product of division of chromosomes
B
two identical chromosomes from each parent
C
chromosome arranged on spindle fibre during cell division
D
chromosome arranged on the equatorial plate of the cell
E
Daughter chromatide in the first melotic division
medium Difficulty
Page 1665 of 1989