Human evolution
Human evolution is the lengthy process of change by which people originated from apelike ancestors. Scientific evidence shows that the physical and behavioral traits shared by all people originated from apelike ancestors and evolved over a period of approximately six million years.
One of the earliest defining human traits, bipedalism -- the ability to walk on two legs -- evolved over 4 million years ago. Other important human characteristics -- such as a large and complex brain, the ability to make and use tools, and the capacity for language -- developed more recently. Many advanced traits -- including complex symbolic expression, art, and elaborate cultural diversity -- emerged mainly during the past 100,000 years.
Humans are primates. Physical and genetic similarities show that the modern human species, Homo sapiens, has a very close relationship to another group of primate species, the apes. Humans and the great apes (large apes) of Africa -- chimpanzees (including bonobos, or so-called “pygmy chimpanzees”) and gorillas -- share a common ancestor that lived between 8 and 6 million years ago. Humans first evolved in Africa, and much of human evolution occurred on that continent. The fossils of early humans who lived between 6 and 2 million years ago come entirely from Africa.
Most scientists currently recognize some 15 to 20 different species of early humans. Scientists do not all agree, however, about how these species are related or which ones simply died out. Many early human species -- certainly the majority of them – left no living descendants. Scientists also debate over how to identify and classify particular species of early humans, and about what factors influenced the evolution and extinction of each species.
Early humans first migrated out of Africa into Asia probably between 2 million and 1.8 million years ago. They entered Europe somewhat later, between 1.5 million and 1 million years. Species of modern humans populated many parts of the world much later. For instance, people first came to Australia probably within the past 60,000 years and to the Americas within the past 30,000 years or so. The beginnings of agriculture and the rise of the first civilizations occurred within the past 12,000 years.
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The answer to this question is the sacrum. The sacrum is a triangular bone that forms the base of the spinal column. This bone has a vital role in the skeletal system and also supports the weight of the upper body of a person and this bone and many nerves are inside the sacrum.
A. True
However, this is not necessarily the only factor that makes this true.
The Himalayan region is located at a height of more than 3300m above sea level. Similar to Terai, the hilly region's altitude spans from 600 to 3300 meters above sea level. In Terai, it is hot, whereas the Himalayas are frigid. In the Hilly region, the temperature is moderate and neither hot nor cold.
<h3>How the Himalayan differ from the Terai region ?</h3>
Due to differences in geographical makeup and height, the mountainous, hilly, and Terai regions differ from one another. Mountains are found in high elevation.
- Bengal tigers are most numerous in the Himalayan grasslands, where they coexist with Asian elephants and one-horned rhinos. Red pandas, golden langurs, and takins can find refuge in the highlands. Bengal tigers and snow leopards are only known to coexist here in the globe.
- Rhododendrons are found all throughout the world, although they are more prevalent in the wetter regions of the eastern Himalayas, where they can grow as tall trees or short shrubs. In the alpine zone's lower elevations, when humidity is high, mosses and lichens thrive; flowering plants are found at higher elevations.
- Sloths, Himalayan black bears, yellow-throated martens, Himalayan gorals, Ganges dolphins, gharials, and crocodiles are some other rare animals. Human-animal conflict is a pressing issue in the Terai Arc, which encompasses a substantial portion of the state of Uttar Pradesh.
- Cycas pectinata, Gnetum montanum, Duabanga grandiflora, Calamus species, Cythea pinulosa, Pandanus nepalensis, and Podocarpus neriifolius are examples of the typical vegetation in this area. The Terai region as a whole is dominated by Shorea robusta (sal).
To know more about the Himalayan region please click here : brainly.com/question/26697261
To know more about the Terai region please click here : brainly.com/question/20882485
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You can easily remember it because the scientific name of leech is Hirudinaria. So it secretes anticoagulant named hirudin. Which help it to feed blood longer
