Waec Biology Past Questions
Question 1926
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
- B. microbial activity had released nutrients into the soil
- C. the roots of vegetable seedlings easily get enough light
- D. refuse dumps possess plenty of gas which scares away rodents
Question 1927
Heterozygous tall plants were crossed with pure-breeding dwarf plants of the same species. What were the approximate percentages of the offspring?
- A. 100% tall 0% dwarf
- B. 75% tall 25% dwarf
- C. 50% tall 50% dwarf
- D. 25% tall 75% dwarf
Question 1928
Which of the following traits in humans can be affected by environmental factors?
- A. skin colour
- B. eye colour
- C. baldness
- D. tongue-rolling
Question 1929
What will be the genotypic ratio when two heterozygous red pea plants are crossed?
- A. 1 : 0
- B. 1 : 2 : 1
- C. 2 : 1
- D. 3 : 1
Question 1930
In man, sex is determined by the inheritance of
- 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.
