Study and practice Biology past questions with answers and detailed explanations. Then test your knowledge using our interactive CBT practice platform and prepare confidently for your upcoming examinations.
A virus can sometimes be regarded as a living organism because it
Acauses disease in plants and animals
Bexists in a variety of shapes
Creproduces in living cells
Dis easily visible with the aid of an electron microscope
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Question 562
waec2005
The group mollusca is characterized by the presence of
Ajointed appendages
Bstar-shaped bodies
Cbackbones
DSoft, non-segmented
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Question 563
waec2005
Which of the following groups embraces the rest?
AClass
BKingdom
CPhylum
DSpecies
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Question 564
waec2004
The theory of evolution by natural selection was first put forward by
AAristotle
BDarwin
CLinnaeus
DBoyle
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Question 565
waec2004
Which of the following is not included in the theory of natural selection?
Astruggle for existence
Boffspring show variation
Cinheritance of adaptive structures
Ddisappearance of functionless organs
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Question 566
waec2004
Which of the following organisms exhibit division of labour?
Ahouseflies
Bbutterflies
Ccockroaches
Dtermites
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Question 567
waec2004
Which of the following statements is correct about the chromosomes in the gametes? At the end of the second
meiotic division
Aeach gamete contains only paternal hereditary information
Bchromosomes contain a random mixture of paternal and maternal chromosomes.
Cchromosomes in the four gamete cells are diploid in number
Dchromosomes contain only maternal hereditary information
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Question 568
waec2004
In the F1 generation of Mendel’s experiment obtained by crossing pea plants of long stems with those of short stems,
What was his observation?
Asome were short while others were long
Ball were long
Chalf of them were long while half were short
Dthree-quarters were long while one quarter were short,
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Question 569
waec2004
Heterozygous tall plants were crossed with pure-breeding dwarf plants of the same species. What were the approximate percentages of the offspring?
A100% tall 0% dwarf
B75% tall 25% dwarf
C50% tall 50% dwarf
D25% tall 75% dwarf
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Question 570
waec2004
Which of the following traits in humans can be affected by environmental factors?
Askin colour
Beye colour
Cbaldness
Dtongue-rolling
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Question 571
waec2004
What will be the genotypic ratio when two heterozygous red pea plants are crossed?
A1 : 0
B1 : 2 : 1
C2 : 1
D3 : 1
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Question 572
waec2004
In man, sex is determined by the inheritance of
Aa pair of homologous chromosomes
Ban extra chromosome in the cells of a female
Ca dominant gene for maleness present in man
Dtwo similar X chromosomes in the female and X and Y chromosomes in the male.
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Question 573
waec2004
The ability of some individuals to taste phenylthiocarbamide (PTC) is a
Amorphological adaptation
Bmorphological variation
Cphysiological adaptation
Dphysiological variation
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Question 574
waec2004
Which of these physiological variations is sex-linked?
Aalbinism
Bblood groups
Csickle-cell anaemia
Dhaemophilic condition
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Question 575
waec2004
Tropical rain forests can be conserved by the following practices except?
Aagroforestry
Bdeforestation
Cshifting cultivation
Dcrop rotation
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Question 576
waec2004
Which of the following practices does not contribute to intensive depletion of forest resources in West Africa?
AUse of powerful tools for felling trees
Bregrowing of forest trees
Cclearance of forests for cash crops
Duse of fire or hunting in forests
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Question 577
waec2004
The following are natural resources except
Arubber
Bsoil
Cwater
Dcellophane
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Question 578
waec2004
An abandoned refuse dump mag' be a good site for an intending vegetable farmer because
A. very little manual work would be done by the farmer
Bmicrobial activity had released nutrients into the soil
Cthe roots of vegetable seedlings easily get enough light
Drefuse dumps possess plenty of gas which scares away rodents
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Question 579
waec2004
The drugs which inhibit the growth of disease-causing organisms and thus used in the treatment of infections are referred to as
Aantibodies
Bantibiotics
Cantitoxic
Dseptics
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Question 580
waec2004
If a piece of abandoned farmland went through a series of floral and faunal changes and became established with
permanent plant and animal population, it could be said to have undergone
