Here are some of the more common reasons your urine's odor may change: 1  Medications or supplements. 2  Certain genetic conditions, such as Maple Syrup Urine Disease, which causes urine to smell sickeningly sweet. 3  Certain foods â most notably asparagus.  Urinary tract infections.
The study of one type of evidence of evolution is called embryology, the study of embryos. An embryo is an unborn (or unhatched) animal or human young in its earliest phases.Embryos of many different kinds of animals: mammals, birds, reptiles, fish, etc. look very similar and it is often difficult to tell them apart. Many traits of one type of animal appear in the embryo of another type of animal.For example, fish embryos and human embryos both have gill slits. In fish they develop into gills, but in humans they disappear before birth.any traits of one type of animal appear in the embryo of another type of animal. For example, fish embryos and human embryos both have gill slits. In fish they develop into gills, but in humans they disappear before birth.
Many species have similar traits because they are descendants of a single common ancestor. These species developed from a single source and are related to a certain degree despite their current differences. The traits they share are known as homologous structures.Homologous structures are similar in structure and function because they originated from the same ancestor long ago. Species may also have similar traits even though they are not related to each other.This usually results because the species live in similar environments and fill similar ecological roles. The structures in this case are known as analogous structures.The process that brings these traits forward is called convergent evolution. Convergent evolution is natural selection that favors the same type of structure in different ancestors.owever, even though these wing structures serve the same function for these different animals, the bone structures, wing coverings (such as feathers, scales, hair, etc.), shapes, and sizes are quite different. Another example of an analogous trait is fins.