The center which controls respiratory activities the mammalian brain is the
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1980
Oxygen from the atmosphere reaches the mammalian blood stream through one of the path indicated below. Indicate the correct path, a = mouth, b = trachea, c = bronchiole, d = nostril, e = bronchus, f = alveoli
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1980
A few grams of dried soil were first heated until red hot and then further heated until no more smoke was released. This experiment was to determine
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1980
During thunderstorms the energy of lightning discharge causes
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1980
Leguminous plants, e.g Mucana, are usually planted in cultivated farmlands because they
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1980
If a baby is a female, her mother's ovum must have been fertilized by a sperm carry the chromosome
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1980
In animals, cilia, flagella, pseudopodia and chaetae, can be used for
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1980
The amount of water loss from a leaf can be detected using
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1980
A mosquito which produces eggs which float, and whose larvae lie horizontal to the water surface, also rests at the angle on a vertical surface. This type of mosquito is
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1980
Below are some group of diseases. Which group of diseases is caused by bacteria?