Which structure protects the tip of the root?

Which structure protects the tip of the root?

• A. Guard cell
• B. Style
• C. Rootcap
• D. Stigma

Answer: (C)

The main idea is that a protective covering at the root tip is essential for shielding the growing cells as the root pushes through soil, while also aiding movement and orientation. The root cap fits this role perfectly: it forms a protective layer over the tip where cell division occurs, shielding the delicate apical meristem from abrasion as the root encounters soil particles. It also secretes mucilage that lubricates the path of growth, making it easier for the root to move forward. In addition, the root cap participates in gravity sensing, helping the root determine direction so it grows downward toward gravity. The other structures are not involved with protecting the root tip. Guard cells regulate stomata on leaves and are not part of the root. The style and stigma are components of the flower’s pistil, involved in pollen reception and fertilization, not root protection.

The main idea is that a protective covering at the root tip is essential for shielding the growing cells as the root pushes through soil, while also aiding movement and orientation. The root cap fits this role perfectly: it forms a protective layer over the tip where cell division occurs, shielding the delicate apical meristem from abrasion as the root encounters soil particles. It also secretes mucilage that lubricates the path of growth, making it easier for the root to move forward. In addition, the root cap participates in gravity sensing, helping the root determine direction so it grows downward toward gravity.

The other structures are not involved with protecting the root tip. Guard cells regulate stomata on leaves and are not part of the root. The style and stigma are components of the flower’s pistil, involved in pollen reception and fertilization, not root protection.