please explain megasporangium briefly and also explain MMC.
Answers
Answer:
Megasporangia (female sporangia) produce megasporocytes (megameiocytes) that yield megaspores. The sporangia may be borne in specialized structures such as sori in ferns, cones (strobili) in some pteridophytes and most gymnosperms, or flowers in angiosperms.
Explanation:
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Answer:
Megasporangium or Ovule is the structure inside ovary where megaspore formation takes place.
The internal structure of the Ovule consists of the following parts:
Funicle: Stalk that attached ovule to placenta
Hilum: Junction between ovule & funicle
Integuments: One or many protective envelopes around ovule
Micropyle: A small opening at the tip of integuments
Chalaza: Basal part of ovule
Nucellus: Mass of cells enclosed within integuments used for food storage
Embryo sac: Female gametophyte located in nucellus
MEGASPORE MOTHER CELL(MMC):
•a diploid cell in plants that undergoes meiosis to create four haploid megaspores
•The megaspore mother cell arises within the megasporangium tissue.
•These cells resides within the ovule that is surrounded by integuments