Q7 of 51 Page 7

How are pteridophytes different from the phanerogams?

Pteridohyta have naked embryo called spores and inconspicuous reproductive organs whereas phanerogams have well differentiated reproductive organs and covered embryo.

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How many chambers are present in the heart of fishes and frogs?

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Why do we classify of organisms.

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In the hierarchy of classification, which grouping will have the smallest number of organisms with a maximum of characteristics in common and which will have the largest number of organisms?

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How are the criteria for deciding divisions in plants different from the criteria for deciding the sub-groups among animals?