WAEC Biology 2026 Question 29

Question 29

Variation

The diagram below is an illustration of the percentage of tongue rollers and non-tongue rollers in a human population. The type of variation in the illustrated diagram is

A.adaptive
B.continuous
C.discontinuous
D.environmental

Show the answer and explanation

Answer: C (discontinuous)

Explanation

People are either rollers or non-rollers, with no in-between groups, so the variation is discontinuous.