Question

hox genes
intermediate fossil forms
homologous structures
analogous structures
similar patterns of embryological development in different but related organisms are responsible for the formation of

Explanation:

The question is about what is responsible for similar patterns of embryological development in different but related organisms. Hox genes are known to regulate the development of body plans and embryonic structures in animals. Intermediate fossil forms relate to evolutionary history but not directly to embryological development patterns. Homologous structures are about similar structures due to common ancestry (more about anatomy post - development), and analogous structures are similar in function but not related by common ancestry. So hox genes are responsible for the similar embryological development patterns.

Answer:

hox genes