91 What gives flowers their scent?

Oils in the petals

92 A substance used to destroy micro-organisms and render the material sterile is called

A disinfectant

93 Sleeping sickness is caused by a

Protozoan

94 The organic nutrient with the highest calorific value is

Fat

95 The Vitamin associated with the clotting of the blood is

Vitamin K

96 The brain centre for the control of breathing is in the

Medulla

97 The combination of a red glass plate and a blue glass plate will transmit

Virtually no light

98 Modern classifications of plants and animals is based on a system devised by

Linnaeus

99 Radio waves are much like

Light waves

100 The normal period of time for one complete cardiac cycle in an adult is about

0.8 Seconds