Polycythemia is defined an abnormal increase in the number of circulating red blood cells. It is mainly caused by a cancerous condition known as myeloproliferative disorder or due to a low supply of oxygen to body tissues usually due to living in high altitude areas and the body tries to compensate by producing more red blood cells to increase oxygen carrying capacity of the blood
Normal blood count values in a male adult is 4.7 to 6.1 million cells/mcL, while in a female adult it is 4.2 to 5.4 million cell/mcL.
If this blood cell count is significantly higher then these values, and remains there or continues to rise, over a given period of time, accompanied with some specific symptoms, then polycythemia is suspected.
Archaeologists studying an archaeological site use seriation to :
<u>determine the relative age of each layer of objects</u>
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Explanation:
- The goal of archaeology is to understand how and why human behavior has changed over time.
- Archaeologists search for patterns in the evolution of significant cultural events such as the development of farming, the emergence of cities, or the collapse of major civilizations for clues of why these events occurred.
- Archaeologists use a statistical sampling method to select which squares or units they will excavate.
- They will collect surface artifacts, then remove any ground vegetation. Archaeologists screen all soil removed from a unit to recover small artifacts and ecofacts.
- Artifacts include tools, clothing, and decorations.
- Non-portable remains, such as pyramids or post-holes, are called features. Archaeologists use artifacts and features to learn how people lived in specific times and places.
- Archaeologists might study the million-year-old fossils of our earliest human ancestors in Africa.
I believe the answer is true
The correct description of structure and function is the small intestines; absorbs fats and fatty acids. The cardiac sphincter prevents the acidic contents of the stomach from moving upward into the esophagus. The stomach is where digestion takes place, both mechanical and chemical digestion
Answer:
Sir Edward Burnett Tylor & Lewis Henry Morgan.
Explanation:
Anthropology may be defined as the field of science that mainly deals with the study of the human and its behavior. The evolutionary study of human is done in Anthropology.
Burnett Tylor & Lewis Henry Morgan gave the first theory on the anthropology. They explained the impact of the society on the behavior and evolution of organisms. According to them, the development of the society is based on the order of the culture and occurs at different rate. They explain the social evolution in anthropology.
Thus, the answer is Burnett Tylor & Lewis Henry Morgan.
