Which of the following correctly summarizes the life cycle of fern plant?
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1992
A tissue can best be defined as
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1992
The organelle involved in tissue respiration is the
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1992
The structure labelled Y is the
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1992
The structure labelled X is used by the organism in the same way as man uses his
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1992
The flowering period of plants in a habitat is determined by the
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1992
The essential structural difference between hydra and tapeworm is that while Hydra
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1992
A major difference between platyhelminthees and coelenterates is that platyhelminthes
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1992
The major site of photosynthesis in the leaf is the
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1992
Fungi are heterotropic because they
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1992
The flow of air and water in or out of the mesophyll layer of a leaf is controlled by the
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1992
An onion is a bulb because it
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1992
Which of the following insects undergoes incomplete metamorphosis?
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1992
The excretory organ in insects is the
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1992
In the absence of oxygen, the pyruvic acid produced during glycolysis is converted to CO2 and
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1992
Gaseous exchange in Aves occurs in the
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1992
The blood vessel which carries blood from the alimentary canal to the liver is the
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1992
5 cm3 dilute sodium hydroxide solution and 5 cm3 one percent copper sulphate solution are added to a solution of food specimen. The purple colour which is observed shows the presence of