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Biology Past Questions and Answers

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Waec Biology Questions

Question 921:

Tropical rain forests can be conserved by the following practices except

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A Agroforestry
B Deforestation
C Shifting cultivation
D Crop rotation

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Question 922:

Which of these physiological variations is sex-linked?

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A Albinism
B Blood groups
C Sickle-cell anaemia
D Haemophilic condition

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Question 923:

The ability of some individuals to taste phenylthiocarbamide (PTC) is a

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A Morphological adaptation
B Morphological variation
C Physiological adaptation
D Physiological variation

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Question 924:

In man, sex is determined by the inheritance of

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A A pair of homologous chromosomes
B An extra chromosome in the cells of a female
C A dominant gene for maleness present in man
D Two similar X chromosomes in the female and X and Y chromosomes in the male.

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Question 925:

What will be the genotypic ratio when two heterozygous red pea plants are crossed?

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A 1 : 0
B 1 : 2 : 1
C 2 : 1
D 3 : 1

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