Branchial basket is the modification of

Options

A. Mouth in cephalochordate
B. Pharynx in cephalochordate
C. Pharynx in urochordate
D. Stomach in urochordate

Answer

To solve the question "Branchial basket is the modification of," we can follow these steps:

### Step 1: Understand the term "Branchial Basket"
The branchial basket is a structure associated with the respiratory system in certain lower organisms. It is important to know what it is and where it is found.

**Hint:** Look for definitions of the branchial basket in biological literature.

### Step 2: Identify the organisms that possess a branchial basket
The branchial basket is found in certain groups of organisms, particularly in some protochordates and lower invertebrates. It is not present in higher organisms like fishes.

**Hint:** Think about the classification of organisms and where the branchial basket might be located.

### Step 3: Determine the anatomical structure from which the branchial basket is derived
The branchial basket is a modification of the pharynx in cephalochordates and urochordates. It serves a function related to respiration and supports the gills.

**Hint:** Consider the anatomical features of cephalochordates and urochordates and how they relate to the branchial basket.

### Step 4: Conclude the correct answer
Based on the information gathered, the branchial basket is a modification of the pharynx, particularly in cephalochordates and urochordates.

**Hint:** Review the definitions of cephalochordates and urochordates to confirm the relationship with the branchial basket.

### Final Answer
The branchial basket is a modification of the pharynx in cephalochordates and urochordates.