Biology Practice Test – Transport Systems and Mechanisms (Questions with Answers and Explanations)

Conduction of water and mineral salts through the xylem vessels is enhanced because the xylem cells are _______ (WASSCE 2013)

A. thickened with lignin.
B. long, narrow tubes placed end to end.
C. close to the endodermis
D. centrally placed in the roots.

Blood pressure is higher in the arteries as a result of _______ (WASSCE 2015)

A. stress    
B. contraction and relaxation    
C. blockage in the arteries
D. pressure of valves

A mixture of blood with antigen A and blood containing antibody A will ________ (WASSCE 2021)

A. lead to agglutination.
B. facilitate dissolution of clot.
C. have no effect on blood composition.
D. change the blood group.

The ascent of water in tall trees is mainly due to ______ (WASSCE 2018)

A. adhesive forces
B. transpiration pull
C. root pressure
D. cohesive forces.

The figure below is the vertical section through the heart.

Which of the labelled parts is the vena cava opening? (JAMB 1980)

A. 1     B. 2     C. 3     D. 4