Study of raphides form the basis of

Options

A. Phenetics
B. Cytotaxonomy
C. Karyotaxonomy
D. Chemotaxonomy

Answer

To solve the question "Study of raphides forms the basis of," we need to understand what raphides are and how they relate to the given options.

### Step-by-Step Solution:

1. **Define Raphides**:
Raphides are sharp, needle-shaped crystals made of calcium oxalate. They are found in various plant tissues such as leaves, roots, shoots, and fruits.

**Hint**: Remember that raphides are specific types of crystals found in plants.

2. **Understand the Context**:
The study of raphides involves examining these calcium oxalate crystals to gather information about the plant's biochemical composition.

**Hint**: Think about what studying the biochemical aspects of plants could relate to in terms of classification or taxonomy.

3. **Analyze the Options**:
The options provided are:
- A) Fanatics
- B) Cytotaxonomy
- C) Karyotaxonomy
- D) Chemotaxonomy

**Hint**: Consider the definitions of each type of taxonomy to see which one relates to biochemical substances.

4. **Identify the Correct Taxonomy**:
- **Cytotaxonomy** deals with the cellular structure and chromosome number.
- **Karyotaxonomy** focuses on the study of the number and structure of chromosomes.
- **Chemotaxonomy** involves the classification of plants based on their chemical constituents, including secondary metabolites and crystals like raphides.

**Hint**: Since raphides are crystals of calcium oxalate, they are a chemical component, making chemotaxonomy the most relevant option.

5. **Conclusion**:
The study of raphides forms the basis of **chemotaxonomy**.

**Final Answer**: D) Chemotaxonomy