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Question
Cycas has two cotyledons but is not included in angiosperms because of
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Solution
The correct option is A Naked ovules
Gymnosperm seeds are multicotyledonous, the number of cotyledons ranging from 2-24. Angiosperm seeds have only one or two cotyledons. So, if a seed has two cotyledons like Cycas, it may belong to Gymnosperms or Angiosperms. In Cycas, the seed does not occur inside a fruit but lies naked or exposed on the surface of megasporophyll. Before fertilization and the formation of the seed, the ovule is naked. This is a characteristic of Gymnosperms. Hence Cycas is a gymnosperm. In angiosperms, the ovules are enclosed in ovaries and seeds in fruits.
Gymnosperm seeds are multicotyledonous, the number of cotyledons ranging from 2-24. Angiosperm seeds have only one or two cotyledons. So, if a seed has two cotyledons like Cycas, it may belong to Gymnosperms or Angiosperms. In Cycas, the seed does not occur inside a fruit but lies naked or exposed on the surface of megasporophyll. Before fertilization and the formation of the seed, the ovule is naked. This is a characteristic of Gymnosperms. Hence Cycas is a gymnosperm. In angiosperms, the ovules are enclosed in ovaries and seeds in fruits.
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