What term is used to describe the variety of life and its processes, including the variety of living organisms, the genetic differences among them, and the communities and ecosystems in which they occur?

• Correct Answer: evolution
• biosphere
• habitat
• biodiversity

Explanation: Biodiversity refers to the variety of life and its processes, including the variety of living organisms, the genetic differences among them, and the communities and ecosystems in which they occur. Scientists have identified about 1.9 million species alive today. They are divided into the six kingdoms of life shown in Figure below . Scientists are still discovering new species. Thus, they do not know for sure how many species really exist today. Most estimates range from 5 to 30 million species.

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