Waec Biology Past Questions and Answers

Question 1796:

• WAEC 1988

Double fertilization is said to occur in flowering pants because

A. Two embryos are formed
B. One egg is fertilized twice
C. Two sperms fertilize each egg
D. One embryo and endosperm nucleus are formed
E. Two sperms and two pollen grains are involved

Question 1797:

• WAEC 1988

THe bicuspid valve is located between the

A. Left auricle and left ventricle
B. Aorta and left ventricle
C. Superior vena cava and inferior vena cava
D. Right auricle and superior vena cava
E. Right auricle and right ventricle

Question 1798:

• WAEC 1988

The pulmonary artery carries

A. Deoxygenated blood from the right ventricles to the lungs
B. Oxygenated blood from the right ventricle to the lungs
C. Oxygenated blood from the left ventricles to the ventricles to the right auricle
D. Deoxygenated blood from the left ventricles to the right auricles
E. Oxygenated blood from the lings to the right auricles

Question 1799:

• WAEC 1988

Which of the following blood components has the greatest affinity for oxygen and carbondioxide?

A. Blood plasma
B. Leucocytes
C. Thrombocytes
D. Erythrocytes
E. Lymphocytes

Question 1800:

• WAEC 1988

The thoracic cavity is separated from the abdominal cavity by a sheet of muscle called

A. Pleural membrane
B. Intercostal muscles
C. Diaphragm
D. Pericardium
E. Epiglottis