D two cells with 12 chromosomes in zero homologus
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)
Prokaryotes do not have membrane bound organelles, but eukaryotes do.
Answer:
Explanation:what do you mean?
Option C. Organisms were probably more complex during past eras.
