The single healthy megaspore retained within the megasporangium germinates to form an egg containing female gaemtophyte called______________?
Correct answer: D. Embroyo sac
- A. Ovule
- B. Seed
- C. Fruit
- D. Embroyo sac
Explanation
The surviving megaspore develops by mitotic divisions into the embryo sac, the female gametophyte of flowering plants, which contains the egg cell and other nuclei. Students may choose ovule because the embryo sac is located inside it, but the ovule is the whole structure, not the female gametophyte itself.
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Animal and plant cells share a plasma membrane, cytoplasm, nucleus, ribosomes, mitochondria and endoplasmic reticulum, but plant cells also have a cellulose cell wall, chloroplasts and a large permanent vacuole. Questions cover organelle structure and function, differences between the two cell types, and how membranes control movement of substances.
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