Waec Biology 2005 Past Questions and Answers

Question 21:

• WAEC 2005

Only specially adapted micro-organisms are found in

A. Salty water
B. Humid air
C. Moist soil
D. Mouth cavities

Question 22:

• WAEC 2005

Which of the following organisms causes syphilis?

A. Mycobacterium tuberculosis
B. Bordetella pertusis
C. Treponema pallidlum
D. Clostridium tetani

Question 23:

• WAEC 2005

In plant respiration occurs in

A. Mesophyll cells only
B. The root only
C. The stomata and lenticel only
D. All living cells

Question 24:

• WAEC 2005

A faster colour change of a dry cobalt chloride paper affixed to the lower surface of a leaf than the upper one, indicates that

A. Sunlight slows down water loss from the upper surface
B. The lower surface of the leaf has more stomata
C. Sunlight causes the stomata on the upper surface to close
D. Stomata are not present on the upper surface of a leaf

Question 25:

• WAEC 2005

Which of the following takes place when a person’s body temperature rises above 37^oC

A. Sweating and vasoconstriction
B. Panting and vasoconstriction
C. Sweating and vasodilation
D. Panting and vasodilation