Question 9.
Write short notes based upon the information known to you.
Embryology.
Answer:
Embryology is the study of the formation and development of an embryo and fetus. All multicellular organisms start their life form one cell structure called zygote. Zygote undergoes repeated mitosis changed into morula. It changed into blastula and then to gastrula. Gastrula develops into mature fetus.
