Question

Question #8370d

Answer 1

Some fossile pieces such as the Archeopteryx and the living group of fish named Sarcopterygii.

Explanation:

There are many evidences that suggest that the Theory of Natural Selection, considering macro evolution, is true. However, the most compelling pieces of evidences are, perhaps, the presence of of organisms that stablish a clear link between two groups, which would be "caught in the middle of the evolution process".

A good example is the fossile of the Archeopteryx 'dinosaur', discovered in 1861. Despite being a reptile, this species shows clear evidence that it had feathers all over his body, and his anterior limbs were wing-like; this, among with many other anatomical clues, suggests that birds evolved from the reptiles.

Check this two images: the first one is an Archeopteryx fossile, and the other one is a representation created based on the impressions:

Another great example is a living group of fish named Sarcopterygii. This group shows simple lungs and their anterior fins shows a bone structure similar to the tetrapods. Scientistis suggest that the coelacanths (popular named for this group) are the link between fishes and the first amphibians due to their similarity with tetrapods.

This is a comparison between the coelacanth and some primitive tetrapods: