AP BIOLOGY

Detailed explanation-1: -Zygote is a single cell produced by the fusion of a male gamete with the female gamete. In the case of plants, ovule contains the zygote. Eventually, the ovule develops into the seed and the zygote develops into the embryo.

Detailed explanation-2: -A zygote is the first diploid cell that is formed by the fusion of male and female gametes resulting in the formation of an embryo.

Detailed explanation-3: -First, the zygote becomes a solid ball of cells. Then it becomes a hollow ball of cells called a blastocyst. Inside the uterus, the blastocyst implants in the wall of the uterus, where it develops into an embryo attached to a placenta and surrounded by fluid-filled membranes.

Detailed explanation-4: -Fertilization is the process in which haploid gametes fuse to form a diploid cell called a zygote. To ensure that each zygote has the correct number of chromosomes, only one sperm can fuse with one egg.

Detailed explanation-5: -Embryonic development is seen only in the diploid generation. The embryo, however, is produced by the fusion of gametes, which are formed only by the haploid generation.