Question

1. sperm*male gametecluster of cells that develops between the third and eighth week of pregnancyunion of a sperm cell and an egg cella female gametethe process by which the zygote attaches to the uterine wall

Explanation:

Sperm is the male gamete. A gamete is a reproductive cell. In humans, the male gamete is sperm and the female gamete is the egg (ovum). The union of a sperm and an egg is fertilization which forms a zygote. A cluster of cells that develops between the third and eighth week of pregnancy is an embryo. The process by which the zygote attaches to the uterine wall is implantation.

Answer:

Male gamete