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.
Identical (Monozygotic) Twins. Identical Twins (Flickr: evilpeacock). Identical twins came from a single egg that split into two. Theyâre genetically identical and (obviously) always the same gender. Early first trimester ultrasound scan can identify approximately two-thirds of monozygotic twins.Our own twins were mis-diagnosed at a second-trimester ultrasound as identical (they werenât).raternal twins came from different eggs and are siblings, but not genetically identical. This is the more common type of twin, representing about two-thirds of twin pregnancies. When conceived naturally, fraternal twins indicate that two eggs were released by the motherâs ovaries instead of one.