Question

In looking at the flattened tails of various sea snake species, we discussed that this feature appears to have evolved independently more than once. Which are the lines of evidence that led to that conclusion?

Answer 1

Flattened tails in sea snakes have evolved independently multiple times, as evidenced by comparative anatomy, evolutionary phylogenies, and the fossil record.

Step-by-step explanation:

Flattened tails in sea snakes have evolved independently multiple times, which can be determined through evidence from comparative anatomy and evolutionary phylogenies.

1. Comparative Anatomy: By examining the structure of the flattened tails in various sea snake species, scientists can identify similarities and differences that suggest separate evolutionary origins. For example, if the flattened tails in two species have distinct anatomical features, it indicates independent evolution.
2. Evolutionary Phylogenies: By constructing phylogenetic trees that represent the evolutionary relationships among sea snake species, scientists can observe the presence of flattened tails in different clades. If multiple clades have species with flattened tails, it suggests convergent evolution.
3. Fossil Record: Fossil evidence can provide insights into the evolutionary history of sea snakes and help determine if flattened tails evolved independently in different lineages.