Artifact Highlights. 1  Harriet Tubman Hymn Book (1876) 2  Jim Crow Railroad car (1920) 3  Rosa Park's Dress (1955) 4  Chuck Berryâs Cadillac (1973) 5  Marian Anderson Ensembel (1939) 6  Tuskegee Airmen Trainer Plane, an open-cockpit PT-13 Stearman (1944)
Hypergamy (colloquially referred to as marrying up) is a term used in social science for the act or practice of a person marrying another of higher caste or social status than themselves. The antonym hypogamy refers to the inverse: marrying a person of lower social class or status.
Budding is relative new method of reproduction. In this a small growth occurs on parent body which develops into new individual. Sexual Reproduction started from protists. In this there is formation of gamete. Along with this meiosis occurs which reduces the chromosome number. It leads to formation of zygote along with fusion of gametes referred as Fertilization. Syngamy and Conjugation are two methods of sexual reproduction. In syngamy there is permanent fusion of gametes to produce a zygote. It can be iso, aniso and oogamy.