47 human teeth found in a cave in South China was recent archaeological find has led us to revise our timeline for the first homo sapiens arrival in China from 50,000 years ago to 80-to-120,000 years ago.
All members of the contemporary human species are Homo sapiens. One of several species included in the genus Homo, Homo sapiens is the only one that is still alive. also view human evolution
The founder of contemporary biological classification (see taxonomy), Carolus Linnaeus, gave the species Homo sapiens its name in 1758. It was a bold move at the time to categorize humans inside the same framework used for the rest of nature, even though it had long been known that humans resemble primates more closely than any other known living things.
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Answer:
Soils are the key ingredient for the plants and crops to grow. A large amount of soil is eroded every year due to the practice of farming. This is about 25 billion tons of soils.
Due to the various type of agricultural practices, the topsoil comprising the valuable minerals are continuously eroded by factors such as wind and water. This results in the increasing loss of soil fertility, and also it can lead to the occurrence of droughts, sandstorms, and dust bowls.
Dust bowls are the region where there occurs no rainfall and absence of vegetation, and soils are eroded drastically making a sandy dust environment, and affecting the ecosystem.
In order to prevent these effects, certain steps must be taken, and they are as follows-
- Planting more trees and crops so that the wind cannot cause much impact on the area.
- The waste vegetative particles and matters must be allowed to distribute evenly over the surface of these areas, so that wind cannot easily transport these sediments.
- Mulching of the soil must be done.
- By constructing the retaining walls.
Pangea is the name of the giant landmass that once contained all of the continents.
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Answer:
Hi
This disease constitutes a health problem of great importance in much of the tropical and subtropical countries. The Centers for Disease Control and Prevention in the United States estimates that 300 to 500 million cases of malaria occur each year. More than 1 million people die from this disease. Malaria is a much higher disease risk for travelers in hot climates, for example, in the United States, about 1500 cases of malaria are diagnosed each year. The vast majority of cases correspond to travelers and immigrants returning from places in the world where there is malaria transmission, such as Africa and South Asia. Because this disease causes so many cases of illness and death, malaria causes great losses to the difficulties of many countries. Because many countries with malaria are among the poorest nations, the disease maintains a vicious cycle of poverty and disease.
Explanation:
Answer:
volcanoes
Explanation:
As the plates moved apart, excessive eruptions of lava constructed volcanoes and filled rift valleys. Subsequent movement rifted these later lava fields, causing long, linear valleys bounded by parallel faults. The divergence of the ridge started in the north about 150 million years ago and 90 million years ago in the south. These movements continue today, accompanied by earthquakes, reactivation of old volcanoes, and creation of new ones. I hope this helps!!
