The number of and types of organisms present on earth, this refers to as?

Answer

**Step-by-Step Text Solution:**

1. **Understanding the Question:** The question asks about the number and types of organisms present on Earth. This indicates a focus on the variety and abundance of living organisms.

2. **Identifying the Number of Organisms:** It is noted that approximately 1.7 million different types of organisms have been discovered and documented. This includes a wide range of life forms.

3. **Recognizing the Types of Organisms:** Organisms can be categorized into various groups such as microorganisms (like bacteria), fungi, plants, and animals (including birds, reptiles, and mammals). This highlights the diversity of life forms present on Earth.

4. **Defining the Concept:** The term that encompasses both the number and variety of organisms is crucial. The large number of different organisms and their various types collectively represent a concept in biology.

5. **Conclusion:** The term that refers to the number and types of organisms present on Earth is "biodiversity." The prefix "bio" refers to living organisms, and "diversity" refers to the variety of these organisms.

**Final Answer:** The number of and types of organisms present on Earth is referred to as **biodiversity**.

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