Question

select the correct statement(s). homologous structures may have a common origin. they may not have a common function. the tetrapod is a common ancestor of all of the organisms. therefore, humans will evolve to become more aquatic - like. all of the organisms evolved from the tetrapod. they will exist together in the same environment. the ancestral tetrapod is the common ancestor to the crocodile and bird. also, to the cetacean and human. as well as the horse and bat. birds and bats are related. humans are unrelated to both.

Explanation:

• Homologous structures: These structures have a common origin but may have different functions. For example, the forelimbs of a human and a bat are homologous. They share a similar bone - structure (common origin) but are used for different purposes (different functions).
• Ancestral tetrapod: The diagram shows that the ancestral tetrapod is a common ancestor to crocodile, bird, cetacean, human, horse, and bat. Evolution is not a linear process with a pre - determined goal like humans becoming more aquatic - like. Also, organisms that evolved from a common ancestor (tetrapod in this case) can live in different environments. And humans, birds, and bats all evolved from the ancestral tetrapod, so they are related.

Answer:

• Homologous structures may have a common origin. They may not have a common function.
• The ancestral tetrapod is the common ancestor to the crocodile and bird. Also, to the cetacean and human. As well as the horse and bat.