Question

A bird’s wing, a dolphin’s flipper, and a cat’s paw are homologous structures. What about these structures supports the theory of evolution?

a) They prove that the limbs of all land animals evolved from wings and fins.
b) They are good examples of vestigial structures.
c) They all have similar sizes and functions.
d) They are evidence that the animals had a common ancestor.

Answer 1

The answer is d) They are evidence that the animals had a common ancestor.

Answer 2

Answer;

D. They are evidence that the animals had a common ancestor.

Explanation;

• Homologous structure are structures that are similar in different species of common ancestry. Dolphin's flipper, bird's wing, cat's leg, and the human arm are considered homologous structures demonstrating that these creatures all had a common ancestor.
• Analogous structures on the other hand are body parts that share a common function but not structure. For example; walking limbs of insects and vertebrates.
• Therefore; homologous structures provide evidence for evolution because it shows the similarities and how organisms evolved from the same ancestors