Some groups of animals, predominantly those that are parthenogenetic, arose as a result of polyploidy. Proof of the role of polyploidy in evolution is given by the polyploid series, in which species of a single genus or family form a euploid series with increases in chromosome number that are multiples of the basic haploid number.
A Brief History of an Old Building: The Alamo The viceroy of Mexico authorized a mission in 1716, but it was not until 1744 that the first stones of the present Alamo were laid. Priests had the Catholic mission San Antonio de Valero built to use to convert the native Indians.he viceroy of Mexico authorized a mission in 1716, but it was not until 1744 that the first stones of the present Alamo were laid. Priests had the Catholic mission San Antonio de Valero built to use to convert the native Indians.
Beginning in the early 1800s, Spanish military troops were stationed in the abandoned chapel of the former mission. Because it stood in a grove of cottonwood trees, the soldiers called their new fort âEl Alamoâ after the Spanish word for cottonwood and in honor of Alamo de Parras, their hometown in Mexico.