Darwins's theory of natural selection is an evidence of evolution by acquiring characters that make survival of an organism feasible in a typical environment.
Fossils records are used to support this theory, by figuring out the common ancestry of different species and different traits that have evolved in them with time.
Embryology is also used as an evidence which shows common origin of the organisms. Other evidences are geographic distributions and homologous structures of the living organisms.
In some cats the gene for tail length shows INCOMPLETE dominance. Cats ... Heterozygous cats have short tails. ... TT x tt = Tt (all short ...
The kidney filters about 200 quarts of blood to remove about 2 quarts of waste and excess water. That excess water and waste is sent to the bladder and leaves the body as urine.