Waec Biology 2013 Past Questions and Answers

Question 11:

• WAEC 2013

Which of the following statements is not correct about the mammalian heart?

A. Oxygenated blood enters the left auricle from the pilmonary vein
B. The walls of the ventricle are thicker than those of the auricle
C. Blood passes from of blood into the right ventricle to the left auricle through the aorta
D. The tricuspid valve prevents the back flow of blood into the right auricle

Question 12:

• WAEC 2013

Which of the following organs are used for gaseous exchange in a mature toad?

A. Gills, lungs and eardrum
B. Lungs, mouth and eardrum
C. Mouth, skin and gils
D. Skin, lungs and mouth

Question 13:

• WAEC 2013

Which of the following statements about the diaphragm of a mammal is not correct? it

A. Separates the thorax and the abdomen
B. Is a thick layer of muscle
C. Is made of epithelial cells
D. Is part of the human respiratory apparatus

Question 14:

• WAEC 2013

Which of the following structures is used for respiration in insects?

A. Lungs
B. Thorax
C. Cuticle
D. Spiracles

Question 15:

• WAEC 2013

A substance present in the glomerular filtrate in the mammalian Kidney is

A. Glucose
B. Fibrinogen
C. Albumen
D. Blood platelets