Which of the following describes the embryonic period? the period during which the zygote moves down to the uterus and begins to implant in the lining the period during which the major organs and structures of the organism first develop the period during which the umbilical cord develops the period during which the placenta begins to function the period during which tremendous growth occurs and the organs continue to develop and become functional

Option (2).

Explanation:

Zygote is formed by the fusion of the male and female gamete during the process of sexual reproduction. The zygote undergoes further development inside the female womb.

The embryonic period starts from the third week after the conception. The important organs and structure development occur during the embryonic period. The formation of three germ layers occur in this period.

Thus, the correct answer is option (2)

i think it would be b. tissue because an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.