<span>Three months after fertilization and development of a placenta around the developing fetus, the corpus luteum regresses and forms the corpus albicans.</span> Formed placenta takes over progesterone production (which was the role of corpus luteum) and the corpus luteum degrades into a corpus albicans. The corpus luteum is being broken down by macrophages, in a process called luteolysis. The remains of the corpus albicans may persist as a scar on the ovary.
Purebreds are the offspring<span> that result from mating between genetically similar parents while </span>hybrids<span> are the </span>offspring<span> that are the result of mating between two genetically dissimilar parents. In the same context, the term </span>hybrid<span> can mean a cross between two breeds.</span>
Movement in the tectonic plates of the earth's crust
Scientists believe that the Earth's early atmosphere lacked oxygen because photosynthetic organisms did not yet exist. Hope this helps and have a great day!
