Question

multiple-choice question
what evidence supports the idea that all of the finches evolved from one common ancestor?
the shape of their beaks
their similar dna
their body size
rewatch

Explanation:

To determine the evidence for finches evolving from a common ancestor, we analyze each option:

• Beak shape (option 1) and body size (option 3) are phenotypic traits that can change due to adaptation (e.g., different diets, environments) and do not directly indicate a common ancestor.
• Similar DNA (option 2) is a strong indicator of shared ancestry because DNA is inherited, and similarities in genetic material suggest a common origin. Evolutionary relationships are often determined by genetic analysis, so similar DNA supports the idea of a common ancestor.

Answer:

B. their similar DNA