Final answer:
The presence of many embryos, known as polyembryony, is a characteristic feature of citrus fruits. It results in seeds that can produce multiple seedlings.
Step-by-step explanation:
The presence of many embryos is a characteristic feature of (a) citrus fruits. This occurs due to a phenomenon known as polyembryony, where multiple embryos develop from a single fertilized egg or sometimes from other parts of the ovule, leading to the seed containing several embryos.
This is opposed to a single embryo typically found in the seeds of fruits such as mango or banana. Polyembryony is common in some plant species and can result in seeds that give rise to multiple seedlings when they germinate.