Coat Color And Grooming Chihuahuas come in two different coat types: smooth and long. The smooth-coated Chihuahua has a smooth, shiny coat that fits close to the body with a ruff of thick, longer hair on the neck. The hair on the head and ears is thinner, and the tail is furry.
Heterospory is the production of spores of two different sizes and sexes by the sporophytes of land plants. Heterospory was evolved from isospory independently by several plant groups in the Devonian period as part of the process of evolution of the timing of sex differentiation.eterospory was evolved from isospory independently by several plant groups in the Devonian period as part of the process of evolution of the timing of sex differentiation.
Report Abuse. This is usually used in a sense of ancestral vs. derived traits. An ancestral trait or primitive one is a trait that was retained by a species from its ancestor. A derived trait is one that has evolved.Both of these terms must be used relative to a classification group.E.G..G. Among primates, the relatively shortened and straight spine of a gorilla is a derived trait (it was not present in the common ancestor of all primates). However, the shortened spine of a gorilla is ancestral to apes (it is present in all apes and in the common ancestor of apes).