What observation would indicate that the thorns on a rosebush are actually modified stems?

Name: What observation would indicate that the thorns on a rosebush are actually modified stems?
Brand: Quizplus
Rating: 4.9 (58 reviews)

Question

Quizplus · Accepted Answer

Thorns on a rosebush would indicate that they are actually modified stems if they have vascular bundles arranged in a ring, which is a characteristic of stems. Stomata and cuticles are features of leaves, and a centrally located vascular bundle is a characteristic of roots.

What Observation Would Indicate That the Thorns on a Rosebush