Waec Biology 2006 Past Questions and Answers

Question 61:

• WAEC 2006

Which of the following vertebrae provide articulating surfaces for the ribs?

A. Thoracic
B. Lumbar
C. Cervical
D. Sacral

Question 62:

• WAEC 2006

Which of the following vertebrae provide articulating surfaces for the ribs?

A. Thoracic
B. Lumbar
C. Cervical
D. Sacral

Question 63:

• WAEC 2006

The ventricles of the mammalian heart have thicker
muscular walls than the auricles because the

A. Ventricles are larger
B. Ventricles receive more blood
C. Ventricles pump blood to longer distances
D. Auricles have smaller capacity

Question 64:

• WAEC 2006

The physical and chemical factors which affect the life of organisms in an environment are described as

A. Biotic
B. Edaphic
C. Abiotic
D. Physiographic

Question 65:

• WAEC 2006

Which of the following orders correctly represents the trend in eutrophication?

A. Lack of oxygen → Death of aquatic organisms → Massive algal growth
B. Excess nitrates and phosphates → Massive algal growth → Lack of oxygen → Death of aquatic organisms
C. Heavy mineralization → Lack of oxygen → Massive algal growth
D. Excess nitrates and phosphates → Lack of oxygen → Massive algal growth → Death of aquatic organisms