what is monoecious and diecious related to gametophytes in pteridophytes in this sense ???
Answers
Answer:
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Explanation:
The main plant of Pteridophytes are sporophytes. They reproduce asexually by forming spores in sporangia. The plants may be homosporous, i.e., produce only one type of spores (e.g., Lycopodium, Pteridium) or heterosporous i.e., produce two different types of spores, smaller microspores and larger megaspores (e.g., Selaginella, Marsilea etc.).
The main plant of Pteridophytes are sporophytes. They reproduce asexually by forming spores in sporangia. The plants may be homosporous, i.e., produce only one type of spores (e.g., Lycopodium, Pteridium) or heterosporous i.e., produce two different types of spores, smaller microspores and larger megaspores (e.g., Selaginella, Marsilea etc.).The spores germinate to produce haploid gametophyte, called as prothallus. The homosporous Pteridophytes produce bisexual (monoecious) gametophytes, whereas heterosporous one produce unisexual (dioecious) gametophytes..
Answer:
ANSWER
A. The fronds in these plants have sporangia which form spores that has the capacity to germinate and grow into a mature gametophytic (prothallus) plant.
B. The lower Pteridophytes which have only one kind of nonsexual spores are called homosporous, as they are sporophytic they are neither monecious or dioecious.
C. The life cycle of pteridophytes shows an alternation of generations i.e, a diploid generation (the sporophytic phase) which forms spores is followed by a haploid generation (the gametophytic phase) which forms gametes.
D. All the pteridophytes are called seedless plants which produce sporangia, on the underside of the non-green leaves called sporophylls.
So, the correct answer is 'In pteridophytes there is a connection between the main sporophytic plant and prothallus'.
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