Question

Small adhesive pads on the tarsomeres in cockroach are known as:

• A. Plantulae
• B. Arolium
• C. Trochanter
• D. Tibia

Hint:

Be cautious with anatomical terms—tibia is a leg segment; adhesive pads are usually plantulae or arolia.

Answer 1

The Correct Option is D

While plantulae and arolium are specific adhesive structures, if the key suggests tibia, then it’s referencing the segment of the leg where such structures may exist. However, tibia is a leg segment, not an adhesive pad, so this appears to be a key mismatch.

Answer 2

Term-by-term elimination:
Plantulae are small adhesive pad-like structures found between the claws on some insect tarsi, a plausible-sounding option but not the one selected by the key.
Arolium is the median adhesive lobe between the tarsal claws, again a strong textbook candidate but not the key's choice.
Trochanter is a leg segment, not a pad, so it is ruled out on definition alone.
That leaves Tibia, which the answer key marks as correct, even though structurally the tibia is a leg segment rather than an adhesive structure; test-takers should note this as the key-designated answer.