Which of the following statements about cuticles is true?

The statement that cuticles contain protein, waxes, and "cement" is accurate as it reflects the complexity of the cuticle's composition. Cuticles, particularly in the context of plants and certain arthropods, serve as protective barriers that prevent water loss and provide defense against pathogens and herbivores. The inclusion of proteins contributes to structural integrity, while waxes help in water resistance. The term "cement" refers to polysaccharides that act as a binding agent, enhancing the cuticle's overall effectiveness and robustness.

Waxes create a hydrophobic layer that repels water, playing a critical role in minimizing water evaporation. The combination of these components allows cuticles to fulfill their biological functions effectively, making the understanding of their composition essential for studies in ecology, plant biology, and entomology.

Understanding the correct composition of cuticles not only clarifies their functions but also informs broader insights into how organisms adapt to their environments, particularly in regard to moisture retention and protection from external threats.