Waec Biology Past Questions and Answers

Question 1836:

• WAEC 1988

If a cross is made between a pure-breeding red flowered plant and a pure-breeding white flowered plant
where R is dominant for red flower and r is recessive for white, the most likely result of F generation will be

A. 75% red flowers and 25% white flowers
B. All red flowers
C. 75% white flowers and 25% red flowers
D. 50% red flowers and 50% white flowers
E. All white flowers

Question 1837:

• WAEC 1988

A man with blood group A (T^AP) married a woman with blood group O (pp). Which of the following is the
probable ratio of the blood groups of the offspring?

A. 1:1
B. 3:1
C. 2:1:1
D. 1:2:1
E. 4:1

Question 1838:

• WAEC 1988

Increasing specialization of structure and function among animals of the same class and order for survival in new and different environments is called

A. Adaptive radiation
B. Phylogeny
C. Homology
D. Analogy
E. Ontogeny

Question 1839:

• WAEC 1988

When large numbers of organisms share limited space and resources the result is

A. Immigration
B. Commensalism
C. Symbiosis
D. Extinction
E. Competition

Question 1840:

• WAEC 1988

The change in colour of the chameleon serves as a means of

A. Attraction to the opposite sex
B. Repulsion of the enemy
C. A camouflage from a predator
D. Regulation of body temperature
E. . production of a variety of skin pigments