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.
No matter how different all living things may look, we all have things in common. Monkeys, people, lizards and frogs all need to breathe, see, move around, etc. These common activities are the result of common genes. So creatures that have to do similar things will often share similar DNA.o these genes will stay the same (or very similar) in all living creatures. These three reasons are why your DNA is 99% identical to a chimpanzee's. And it's 95% identical to a monkey's. And why you are about 79% identical to a mouse and even 36% identical to a little fruit fly!