1- Fertilization is fundamental to sexual life cycles and isoften seen as the start of development.
Of the roughly quarter-billion sperm released in a typicalprimate ejaculate, only a few hundred have any significant chanceof actually fertilizing an egg. It is also the case that all eggsare unlikely to be fertilized. In sea urchins, not all sperm willend up fertilizing an egg and not all eggs will be fertilized.Explain why this is the case in both systems by discussing whatsteps are required for gamete maturation and egg activation.
