Answer:
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)
SOS:
The answer is <em><u>gametes!</u></em>
<em>Hope this helps!</em>
Genome is the correct answer
The purines have two rings in their structure while the pyrimidines have hust one
