Junior Class 1 Answered

Hi Tanishqa,

• The study of development of an organism from the stage of an embryo is called embryology.
• During the course of study, embryos of different genera of vertebrates, e.g. fish, tortoise, chick, amphibians, rabbit and human embryos are compared with one another.
• These animals have different sizes and shapes of adult organisms and also differ in their mode of nutrition. However, the embryos of these animals have striking similarities in the early stages. They differ in their later stages of development.
• The comparison of embryos suggests a common ancestry of these animals. In all the embryos, the development begins with a single cell. The individual group characteristics develop at a later stage in life.