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Biology WAEC / WASSCE 2003 Adaptation & Evolution
Which of following pairs of scientists discovered the Rhesus factor in human blood?
A
Hooke and Lavine
B
Darwin and Landsteiner
C
Landsteiner and Lavine
D
Hooke and Darwin
medium Difficulty
Biology WAEC / WASSCE 2003 Variation & Genetics (Heredity)
The organic molecule (s) present in the nucleus is/are
A
DNA
B
Protein, RNA andDNA
C
RNA and ATP
D
RNA
medium Difficulty
Biology WAEC / WASSCE 2003 Variation & Genetics (Heredity)
In an experiment, a red-flowered plant was crossed with another red-flowered plant and the following results were obtained: 448 red flowers and 154 white flowers in the F1 generation. Which of the following represents the phenotypic ratio of the above genetic cross?
A
1:2:1
B
4:1
C
3:1
D
2:2
medium Difficulty
Biology WAEC / WASSCE 2003 Variation & Genetics (Heredity)
In an experiment, a red-flowered plant was crossed with another red-flowered plant and the following results were obtained: 448 red flowers and 154 white flowers in the F1 generation.Which of the following represents the genotypes of the parents if R is for red gene and r for white gene?
A
RR X Rr
B
RR X rr
C
rr x rr
D
Rr x Rr
medium Difficulty
Biology WAEC / WASSCE 2003 Variation & Genetics (Heredity)
In Mendel's experiments, it was discovered that the skin of an African can be attributed to
A
a blending of black and white genes
B
recombination of genes
C
loss of the epidermis
D
mutation in the skin cells
medium Difficulty
Biology WAEC / WASSCE 2003 Growth, Micro-organisms & Public Health
Sickle-cell anaemia has persisted in the human race due to
A
lack of proper medical care for sicklers
B
carriers being more resistant to malaria
C
mosquito vectors
D
wildlife intermediate hosts
medium Difficulty
Biology WAEC / WASSCE 2003 Adaptation & Evolution
Which of the following is not a behavioural adaptation used by social animals?
A
Cryptic
B
Mimicry
C
Flash
D
Season
medium Difficulty
Biology WAEC / WASSCE 2003 Adaptation & Evolution
In natural selection, Darwin proposed that evolution occurred because of the following conditions except
A
food and other needs are abundant
B
there is a fierce competition among the offsprings
C
That the weaker offsprings are eliminated
D
That nature selects those that will survive to reproduce their kind
medium Difficulty
Biology UTME / JAMB 2003 Variety of Organisms & Classification of Living Things
In the egg of a bird, the embryo is located in the
A
Yolk
B
Embryo disc IV
C
Chalaza
D
Albumen
medium Difficulty
Biology UTME / JAMB 2003 Variety of Organisms & Classification of Living Things
In the egg of a bird, the embryo is located in the
A
Yolk
B
Embryo disc IV
C
Chalaza
D
Albumen
medium Difficulty
Biology NECO SSCE 2003 Nutrition in Plants & Animals (Photosynthesis & Food Substances)
When a plant shows reddish leaves, the soil is deficient in
A
calcium
B
iron
C
nitrogen
D
phosphorus
E
sulphur
medium Difficulty
Biology NECO SSCE 2003 Population Ecology, Habitats & Conservation
Which of the following factors affect population?
A
competition and natality rate
B
heat and space
C
food and mortality rate
D
Space and competition
E
Water and light
medium Difficulty
Biology NECO SSCE 2003 Nutrition in Plants & Animals (Photosynthesis & Food Substances)
The association between guinea worm and tissues of man is called
A
commensalism
B
parasitism
C
predation
D
Saprophytism
E
Symbiosis
medium Difficulty
Biology NECO SSCE 2003 Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Which of the following is NOT true of enzymes?
A
Their reactions are reversible
B
Their reactions are irreversible
C
They remain unchanged after the reaction
D
They are affected by high temperatures
E
They have active sites
medium Difficulty
Biology NECO SSCE 2003 Variety of Organisms & Classification of Living Things
The following are major groups of the plant kingdom EXCEPT
A
Bryophyta
B
Chiorophyta
C
Pteridophyta
D
Spermatophyta
E
Thallophyta
medium Difficulty
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