Question

comparison of extinct ancodons and modern armadillos
glyptodont doedicurus
nine - banded armadillo
the extinct doedicurus belong to a group of mammals called glyptodonts that are related to the armadillos of today. based on fossil evidence, scientists have determined that doedicurus were very large herbivores. some doedicurus were as large as a car. based on the diagram, what role did their hard shells most likely serve for doedicurus and modern - day armadillos?
a. protecting their inner organs from predation
b. providing camouflage in their environment
c. regulating their body temperature
d. attracting potential mates

Explanation:

To determine the role of hard shells in Doedicurus and modern armadillos, we analyze each option:

• Option A: Armadillos and extinct glyptodonts like Doedicurus have hard shells (armor) that physically shield internal organs from predators (e.g., bites, attacks). This aligns with their defensive needs.
• Option B: Their shell color/pattern does not suggest camouflage (e.g., it’s not patterned to blend with environments like a chameleon).
• Option C: Shells are rigid and do not help regulate body temperature (thermoregulation is done via skin, behavior, or respiratory systems, not hard armor).
• Option D: Shells are not used for attracting mates (mating displays in armadillos involve behaviors, not shell appearance).

Answer:

A. Protecting their inner organs from predation