Question

Which one of the following is a matching pair?

• A. Adult starfish – Bilateral symmetry
• B. Taenia – Polymorphism
• C. Pheretima – Sexual dimorphism
• D. Aves – Homeothermy

Answer 1

The correct option is D Aves – Homeothermy

Class Aves includes birds. They are homeotherms (warm blooded).

• Adult starfish is raidally symmetrical, while its larva is bilaterally symmetrical.
• Taenia is a flatworm, and does not exhibit polymorphism, which is typically found in cnidarians. Many cnidarians exist in two different forms during their life span - an asexual polyp form, alternating with a sexual medusoid form.
• Pheretima (earthworm) is bisexual, and hence, does not exhibit sexual dimorphism.