Which of the following statement is not true

Options

A. All members of the kingodom animalia are multicellular
B. Nature of coelom is used as one of the basis of animal classification
C. there is not need of classification now as over a million species of animals have been described till now
D. the arrangment of cells in the body is one of the classifying feature fo the animals

Explanation

To determine which of the following statements is not true, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Statement 1: All members of kingdom Animalia are multicellular.**
- **Analysis:** The kingdom Animalia consists entirely of multicellular organisms. This statement is true.
- **Conclusion:** This statement is correct.

2. **Statement 2: Nature of coelom is used as one of the basis of animal classification.**
- **Analysis:** The coelom, or body cavity, is indeed a significant characteristic used in the classification of animals. Animals can be classified based on whether they are acoelomate, pseudocoelomate, or coelomate. This statement is true.
- **Conclusion:** This statement is correct.

3. **Statement 3: There is no need of classification now as over a million species of animals have been described till now.**
- **Analysis:** Despite the large number of described species, classification is essential for organizing and studying the vast diversity of animal life. This statement is incorrect because classification helps in understanding relationships and characteristics among species.
- **Conclusion:** This statement is not true.

4. **Statement 4: The arrangement of cells in the body is one of the classifying features of the animals.**
- **Analysis:** The arrangement of cells, such as whether an organism is unicellular or multicellular, and the complexity of tissue organization, is indeed a basis for classification. This statement is true.
- **Conclusion:** This statement is correct.

### Final Answer:
The statement that is not true is: **"There is no need of classification now as over a million species of animals have been described till now."**

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