Waec Biology 2019 Past Questions and Answers

Question 1:

• WAEC 2019

The biological importance of the dance by the worker honeybee is that it ___________

A. Acts as a signal for mating
B. Serves as a warning signal
C. Signals the availability of food
D. Serves as a means of identifying members of the caste

Question 2:

• WAEC 2019

The yellow and black stripes on the body of wasps is an example of ____________

A. Mimicry
B. Courtship behaviour
C. Camouflage
D. Warning colouration

Question 3:

• WAEC 2019

The cross between RrTt and rrtt where R is a gene for red colour and T for tallness will result in ____________

A. All the offspring being tall with red fruits
B. 25 % tall with red fruits
C. 50 % tall with red fruits
D. 75 % tall with red fruits

Question 4:

• WAEC 2019

WAEC 2019

A man whose blood group is heterozygous B is married to a woman whose blood up is also heterozygous B
Which of the following statements is correct about the blood group of their four offspring?

A. Three of them belong to blood group B
B. Three of them belong to blood group O
C. None of them belongs to blood group O
D. Two of them belong to blood group B

Question 5:

• WAEC 2019

In a complete dominance monohybrid cross between a pure breeding yellow-flowered plant Y and a pure breeding white-flowered plant y, the result of the first filial generation is ____________

A. 50 % yellow flowers
B. 75% yellow flowers
C. All yellow flowers
D. All white flowers