What is a cuticle?

A cuticle refers to a multilayered tissue that forms a protective layer on the outer surface of various organisms, including plants and animals. In the context of biology, it specifically serves important functions such as preventing water loss, providing structural support, and protecting against environmental hazards. In plants, for instance, the cuticle is a waxy layer that covers the surface of leaves and stems, helping to minimize water evaporation. In animals, particularly invertebrates, a cuticle can provide protection and support, functioning similarly to a skin-like barrier.

Understanding the role of a cuticle is vital in the context of public health, especially regarding how it relates to preserving ecosystems and the impacts of environmental factors on health. The other options do not accurately describe what a cuticle is, as they refer to insect repellent, internal organs, and camouflage, which do not share the core attribute of being a protective tissue layer.