Waec Biology 1995 Past Questions and Answers

Question 46:

• WAEC 1995

Prevention of erosion could best be carried out by

A. Crop rotation and mulching
B. Contouring of slopping ground and afforestation
C. Grazing terracing and shifting cultivation
D. Strip cropping and poaching
E. Bush fallowing and crop rotation.

Question 47:

• WAEC 1995

The following are useful measures for conserving forest except

A. Preventing and controlling accidental forest fire
B. Encouraging the use of charcoal for industrial and domestic purposes
C. Combating and preventing plant diseases
D. Reafforestation of depleted forest
E. Protection of young growing trees

Question 48:

• WAEC 1995

The following practices are aimed at soil conservation except

A. Contour ridging
B. Application of manures
C. Strip cropping
D. Bush clearing
E. Crop rotation

Question 49:

• WAEC 1995

Which of the following natural resources is most readily available to all organisms?

A. Water
B. Oil
C. Food
D. Air
E. Mineral salts

Question 50:

• WAEC 1995

Which of the following is an example of discontinuous variation?

A. Height
B. Size of head
C. Blood group
D. Skin colour
E. Length of foot