Final answer:
A sunflower egg cell has 17 chromosomes, which is half the number of chromosomes found in its somatic cells.
Step-by-step explanation:
The number of chromosomes present in the egg cell of a sunflower is half of that in its somatic cells. Sunflowers (Helianthus annuus) have 34 chromosomes in their somatic cells, such as leaf cells. During the formation of gametes, a process called meiosis reduces the chromosome count by half, so each gamete will have half the number of chromosomes compared to a somatic cell. The correct answer is B) 17 chromosomes in a sunflower egg cell.