Biology 2013 Waec Past Questions and Answers

Question 21 :

• WAEC 2013

The resolution of a microscope refers to its power to

A. Increase an object's apparent size
B. Distinguish clearly between two objects
C. Scan the surface of an object
D. Focus on an object

Question 22 :

• WAEC 2013

The process by which plants manufacture food from carbon dioxide and water using energy from the sun is called

A. Chemosynthesis
B. Photosynthesis
C. Anabolism
D. Catabolism

Question 23 :

• WAEC 2013

Conduction of water and mineral salts through the xylem vessels is enhanced because the xylem cells are

A. Thickened with lignin
B. Long, narrow tubes placed end to end
C. Close to the endodermis
D. Centrally placed in the roots

Question 24 :

• WAEC 2013

Which of the following factors is likely to increase the rate of transpiration in plants?

A. A reduction in the number of stomata per unit surface area
B. Increase in humidity around the leaves of plants
C. An increase in leaf surface area to volume ratio
D. Removal of leaves from plant

Question 25 :

• WAEC 2013

The name of the enzyme that catalyses the conversion of glucose to glucose-6-phosphate at the beginning of glycolysis is

A. Phospho-fructokinase
B. Glucose isomerase
C. Hexokinase
D. Glucose-6-kinase