Answer :
Answer:
Given that the petal of an angiosperm possesses 22 chromosomes, we can deduce that this is the diploid number (2n) of the plant. Therefore, the haploid number (n) would be half of this, which is 11 chromosomes.
Now, let's determine the ploidy and chromosome number of each of the specified structures:
a. **Egg**:
- The egg cell is a part of the female gametophyte, which is haploid.
- **Ploidy**: Haploid (n)
- **Chromosome number**: 11
b. **Nucellus**:
- The nucellus is a part of the ovule, which is part of the sporophyte generation and therefore is diploid.
- **Ploidy**: Diploid (2n)
- **Chromosome number**: 22
c. **Pollen**:
- Pollen grains are male gametophytes, which are haploid.
- **Ploidy**: Haploid (n)
- **Chromosome number**: 11
d. **Integuments**:
- Integuments are part of the ovule and thus part of the sporophyte generation, which is diploid.
- **Ploidy**: Diploid (2n)
- **Chromosome number**: 22
In summary:
- a. Egg: Haploid (n), 11 chromosomes
- b. Nucellus: Diploid (2n), 22 chromosomes
- c. Pollen: Haploid (n), 11 chromosomes
- d. Integuments: Diploid (2n), 22 chromosomes