A species is often defined as the largest group of organisms where two hybrids are capable of reproducing fertile offspring, typically using sexual reproduction, although the species problem encompasses a series of difficult related questions that often come up when biologists define the word species.
What does cuticle mean in Urban Dictionary?: a cuticle is some vibrant thing between your bottom of the nail plus epidermis. Some individuals have actually cuticles that grow up pretty far onto theirâ¦
Hair shaft  the cuticle. The cuticle is the outermost layer of the hair shaft. The cuticle is a single row of cells, which may be identified at the level of the lower bulb. As the cuticle cells sweep upward as a single row from the matrix, they are seen in the upper part of the bulb.