Question

question 13
1 pts
the figure below shows the antler-like structures in beetles.
some beetles and flies have antler-like structures on their heads (see the figure above), much like male deer. the existence of antlers in beetle, fly, and deer species with strong male-male competition is an example of which of the following?
homology
similarity due to shared ancestry
convergent evolution

Explanation:

Analyze the biological structures

The question asks about the antler-like structures found on the heads of some beetles, flies, and male deer. These organisms belong to highly divergent taxonomic groups: beetles and flies are insects (Arthropoda), while deer are mammals (Chordata). Their most recent common ancestor did not possess antlers or antler-like head weapons.

Evaluate evolutionary mechanisms

Using the Homology vs Analogy knowledge point, we distinguish between traits inherited from a common ancestor and traits that evolved independently. Because beetles, flies, and deer do not share a recent common ancestor with antlers, these structures are analogous rather than homologous. This rules out "homology" and "similarity due to shared ancestry."

Identify convergent evolution

Using the Convergent Evolution knowledge point, we look at how similar selective pressures lead to similar adaptations in unrelated lineages. In all three groups, these structures function as weapons in intense male-male competition for mates. The independent evolution of similar functional structures under similar ecological pressures is a classic example of convergent evolution.

Answer:

• homology
• similarity due to shared ancestry
• convergent evolution (Correct answer)