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The factor that least affects food shortages in sub-saharan Africa is
Carbon (IV) oxide content of the atmosphere is least affected by
The number of plants species obtained from a population study of a garden is as follows: Guinea grass (15), Ipomea spp (5), sida spp (7) and Imperata spp (23). What is the percentage of occurrence of Imperata spp?
Salts and water are absorbed in the roots and transported to leaves by
Blood vessel usually pass through the structure labelled
The structure above represents a
When specimen X is mixed with few drops of iodine solution, the appearance of a blue-black colour confirms that X is
The part labelled II is the
The parts which function together to bring about hearing are labelled
The veins of the leaf are formed by the
The transportation of oxygen and carbon (IV) oxide in mammals is carried out by
When yeast respire anaerobically, it converts simple sugar to carbon (IV) oxide and
The enzyme invertase will hydrolyze sucrose to give
A seedling grown in the dark is likely to be
The gas produced during tissue respiration can be identified by using
The part labelled IV is the
The structure that holds the yolk in position is labelled
Urea formation occurs in the
The center for learning and memory in the human brain is the
Which of the following organisms does not exist as a single free living cell?