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Study with Quizlet and memorize flashcards containing terms like How are gymnosperm seeds different from those of angiosperms?, What are gymnosperms?, How do gymnosperms differ from angiosperms? and more.
Study with Quizlet and memorize flashcards containing terms like How do Gymnosperms reproduce?, What are so special about Gymnosperm seeds?, What are the three small phyla of Gymnosperms? and more.
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How does fertilization of gymnosperms occur? pollen grains germinate and grow pollen tubes toward the egg; once tubes are in vicinity of megagametophyte, sperm are released, fertilizing the egg and producing the zygote
- Male Gametophyte
- Female Gametophyte
- Reproductive Process
A male cone has a central axis on which bracts, a type of modified leaf, are attached. The bracts are known as microsporophylls(Figure 2) and are the sites where microspores will develop. The microspores develop inside the microsporangium. Within the microsporangium, cells known as microsporocytes divide by meiosis to produce four haploid microspor...
The female cone also has a central axis on which bracts known as megasporophylls(Figure 3) are present. In the female cone, megaspore mother cells are present in the megasporangium. The megaspore mother cell divides by meiosis to produce four haploid megaspores. One of the megaspores divides to form the multicellular female gametophyte, while the o...
Upon landing on the female cone, the tube cell of the pollen forms the pollen tube, through which the generative cell migrates towards the female gametophyte through the micropyle. It takes approximately one year for the pollen tube to grow and migrate towards the female gametophyte. The male gametophyte containing the generative cell splits into t...
The life cycle of a gymnosperm involves alternation of generations, with a dominant sporophyte in which the female gametophyte resides, and reduced gametophytes. All gymnosperms are heterosporous. The male and female reproductive organs can form in cones or strobili.
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What is the life cycle of a gymnosperm?
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What are the characteristics of a gymnosperm?
Do gymnosperms shed parasites?
Where is a female gymnosperm gametophyte located?
What phylum do gymnosperms belong to?
The life cycle of a gymnosperm involves alternation of generations, with a dominant sporophyte in which reduced male and female gametophytes reside. All gymnosperms are heterosporous. The male and female reproductive organs can form in cones or strobili.
