explain embryological evidences of evolution?
Answers
Answer:
All living organisms in their early developmental stages show presence of the following distinct features:
i. Development in sexually reproducing organisms begins from a single diploid cell stage, i.e. a fertilized egg or zygote.
ii. Zygote undergoes cleavage, blastulation and gastrulation. At the end of gastrulation, three germ layers are formed which give rise to various organs and organ systems.
iii. Embryos of different vertebrates, i.e. from fishes to mammals look alike particularly with reference to gill slits, gill clefts and tail.
From these similarities, it can be concluded that all these groups have evolved from the same ancestral stock.
AnsWER =>
Embryology, the study of the development of the anatomy of an organism to its adult form, provides evidence for evolution as embryo formation in widely-divergent groups of organisms tends to be conserved. Another form of evidence of evolution is the convergence of form in organisms that share similar environments.
For example, fish embryos and human embryos both have gill slits.