The term phylum was given by

Options

A. Cuvier
B. Haeckel
C. Theophrastus
D. Linnaeus

Answer

### Step-by-Step Solution:

1. **Identify the Term**: The question asks about the origin of the term "phylum" in biological classification.

2. **Consider the Scientists Mentioned**: The video transcript mentions several scientists: Cuvier, Heckel, Theophrastus, and Linnaeus.

3. **Determine Who Coined the Term**: Among the mentioned scientists, Ernst Heckel is specifically noted for giving the term "phylum."

4. **Understand the Context of the Term**: The term "phylum" is a taxonomic rank used in the biological classification system. It is a higher level of classification that groups together organisms that share a common body plan or significant features.

5. **Summarize the Contributions of Other Scientists**:
- **Cuvier**: Known for the theory of Catastrophism.
- **Theophrastus**: Recognized for early classification of plants and animals.
- **Linnaeus**: Developed the hierarchical classification system and binomial nomenclature.

6. **Conclude the Answer**: The term "phylum" was given by Ernst Heckel.

### Final Answer:
The term "phylum" was given by Ernst Heckel.

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