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Generative cell , nucellus , antipodals ...

Generative cell , nucellus , antipodals , stigma, embryo, endosperm , secondary nucleus , megaspore
How many of the above are haploid ?

A

2

B

3

C

4

D

5

Text Solution

AI Generated Solution

The correct Answer is:
To determine how many of the listed structures are haploid, we will analyze each item one by one: 1. **Generative Cell**: - The generative cell is haploid. It is formed from the microspore and will eventually divide to form sperm cells. 2. **Nucellus**: - The nucellus is diploid. It is part of the ovule and contains the megasporangium. 3. **Antipodals**: - Antipodals are haploid. They are formed from the megaspores and are located at the opposite end of the embryo sac. 4. **Stigma**: - The stigma is diploid. It is part of the pistil and receives pollen during fertilization. 5. **Embryo**: - The embryo is diploid. It develops from the fertilized ovule. 6. **Endosperm**: - The endosperm is triploid in angiosperms. It is formed from the fusion of a sperm cell with two polar nuclei. 7. **Secondary Nucleus**: - The secondary nucleus is diploid. It is formed during the fertilization process and contributes to the formation of the endosperm. 8. **Megaspore**: - The megaspore is haploid. It develops into the female gametophyte (embryo sac). Now, let's summarize the haploid structures identified: - Generative Cell: Haploid - Antipodals: Haploid - Megaspore: Haploid Thus, the total number of haploid structures from the list is **4** (Generative Cell, Antipodals, and Megaspore). ### Final Answer: **4 structures are haploid.**
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