The sleep cycle is approximately 90 minutes.
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A female urinates with their vulva and a male urinates with his penis
Each of the following is an example of how humans have negatively affected the environment except (d) slash-and-burn forest clearing.
The environment comprises of the surroundings in which an organism lives. It comprises the biotic as well as the abiotic factors. In an environment, it is studied how an organism interacts with the abiotic factors, chemical factors as well as interaction with other living species.
Slash-and-burn forest clearing is the method in which the vegetations are harvested and then the remaining parts are burned to make the land clear. The land created after the fire is called swidden. This is done to provide nutrients to the soil through the ashes of the burned forest.
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Answer:The world population increased from 1 billion in 1800 to 7.7 billion today. The world population growth rate declined from 2.2% per year 50 years ago to 1.05% per year. Other relevant research: ... We show how the world population grew over the last several thousand years and we explain what has been driving this change.
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