Question

How can homologous structures in the forelimbs of these four organisms be used as evidence to suggest that life changes over time?
They are evidence that the same bone structures can serve different functions in different species.

They are evidence of the fact that bone structure determines the ability to adapt to new environments.

They are evidence that one species turns into another species over time and that each has a different type of life.

They are evidence that all came from a common ancestor and that life changed over time for all these organisms

Answer 1

The correct statement is that they are evidence that all came from a common ancestor and that life changed over time for all these organisms.

Homology involves the theory that macroevolutionary associations can be proven by the similarity in the physiology and anatomy of distinct animals. Since, Darwin, homology has been considered as a prime evidence for evolution.

The extensive similarities of muscles, skeletons, nerves, cell ultrastructure, organs of the body, and biochemistry of distinct animal types have proved that a great deal of similarity prevails in both their function and composition.

By aligning or categorizing the huge sets of anatomical compositions on the basis of the similarity of selected traits, evolutionary naturalists have tried to illustrate the proof for a long, slow line of advancing animal modifications ending in the highest species yet, that is, humans.

Answer 2

The answer is ‘They are evidence that all came from a common ancestor and that life changed over time for all these organisms’. The individuals of the ancestor population probably spread out and became separated b geographical features or behavioral modification. Over time, this caused allopatric or/and sympatric speciation. However, these species still bear homologous structures that show this common ancestry.