In statistics, the term linear model is used in different ways according to the context. The most common occurrence is in connection with regression models and the term is often taken as synonymous with linear regression model. However, the term is also used in time series analysis with a different meaning.
For almost 30 centuries—from its unification around 3100 B.C. to its conquest by Alexander the Great in 332 B.C.—ancient Egypt was the preeminent civilization in the Mediterranean world. From the great pyramids of the Old Kingdom through the military conquests of the New Kingdom, Egypt’s majesty has long entranced archaeologists and historians and created a vibrant field of study all its own: Egyptology. The main sources of information about ancient Egypt are the many monuments, objects and artifacts that have been recovered from archaeological sites, covered with hieroglyphs that have only recently been deciphered. The picture that emerges is of a culture with few equals in the beauty of its art, the accomplishment of its architecture or the richness of its religious traditions.
Predynastic Period (c. 5000-3100 B.C.)
Few written records or artifacts have been found from the Predynastic Period, which encompassed at least 2,000 years of gradual development of the Egyptian civilization.
Neolithic (late Stone Age) communities in northeastern Africa exchanged hunting for agriculture and made early advances that paved the way for the later development of Egyptian arts and crafts, technology, politics and religion (including a great reverence for the dead and possibly a belief in life after death).
Around 3400 B.C., two separate kingdoms were established near the Fertile Crescent, an area home to some of the world’s oldest civilizations: the Red Land to the north, based in the Nile River Delta and extending along the Nile perhaps to Atfih; and the White Land in the south, stretching from Atfih to Gebel es-Silsila. A southern king, Scorpion, made the first attempts to conquer the northern kingdom around 3200 B.C. A century later, King Menes would subdue the north and unify the country, becoming the first king of the first dynasty.
In the Archaic Period, as in all other periods, most ancient Egyptians were farmers living in small villages, and agriculture (largely wheat and barley) formed the economic base of the Egyptian state. The annual flooding of the great Nile River provided the necessary irrigation and fertilization each year; farmers sowed the wheat after the flooding receded and harvested it before the season of high temperatures and drought returned.
1. Answer;
They evolved separately as they moved north and became two separate species.
Explanation;
The greenish warblers weren't geographically isolated, but they migrated around the Tibetan Plateau, evolving separately until they were no longer able to interbreed when both species (East and West) contacted in Siberia.
Greenish warblers were thought to have evolved from a single ancestral population that gradually diverged into two new species as it expanded northwards around the Tibetan plateau.
2. Answer;
- Their plumage patterns.
- Genetics and history
Explanation;
West Siberian greenish warblers (P. t. viridanus) and east Siberian greenish warblers (P. t. plumbeitarsus) differ subtly in their plumage patterns, most notably in their wing bars, which are used in communication. While viridanus has a single wing bar, plumbeitarsus has two. Around the southern side of the ring, plumage patterns change gradually.
Additionally, the two northern forms viridanus and plumbeitarsus are highly distinct genetically, but there is a gradient in genetic characteristics through the southern ring of populations. The greenish warblers were once confined to the southern portion of their range and then expanded northward along two pathways, evolving differences as they moved north. When the two expanding fronts met in central Siberia, they were different enough that they do not interbreed.
The correct answer is A.
<u>In the Mayan culture, jade meant life, fertility, and power, for this reason, it was used by the queens</u>. They used it for different social functions: at funerals, like jewelry, in socio-religious rituals, and in the elaboration of tools for daily life. For the Mayans, jade was the material of greater hardness, strength, and durability that they found and was more valuable than gold.
