BIOLOGICAL CLASSIFICATION
KINGDOM PLANTAE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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produce seeds.
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posses vascular tissues.
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has flower
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lack a free-living gametophyte stage.
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Detailed explanation-1: -In gymnosperms and angiosperms, the gametophyte is dependent upon the sporophyte . The male and female gametophytes do not have an independent free-living existence in gymnosperms and angiosperms.
Detailed explanation-2: -Complete answer:In gymnosperms (like Pinus), the male and female gametophyte do not have an independent free-living existence. So They remain within the sporangia retained on the sporophytes that are female gametophyte (within megasporangium) and male gametophyte (within microsporangium).
Detailed explanation-3: -In gymnosperms, the gametophyte generation takes place in a cone, which forms on the mature sporophyte plant. Each male gametophyte is just a few cells inside a grain of pollen. Each female gametophyte produces an egg inside an ovule. Pollination must occur for fertilization to take place.
Detailed explanation-4: -Angiosperms and gymnosperms both utilize seeds as the primary means of reproduction, and both use pollen to facilitate fertilization. Gymnosperms and angiosperms have a life cycle that involves the alternation of generations, and both have a reduced gametophyte stage.
Detailed explanation-5: -In ferns, the gametophyte is free-living and very distinct in structure from the diploid sporophyte.