WAEC - Biology (2001 - No. 14)
Which of the following groups contains a non-supporting structure in animals?
Cartilage, bone and pseudopodia
Pellicle, chitin and bone
Humerus, ribs and cartilage
Femur, pellicle and chitin
คำอธิบาย
The correct answer is 'pellicle, chitin, and bone'. In this option, the pellicle is a non-supporting structure in animals. The pellicle is a thin layer supporting the cell membrane in various protozoa. It provides protection but does not provide structural support like bones or cartilage. Chitin and bone, on the other hand, are supporting structures.