Based on the given features, identify the cell organelle and select the correct option regarding it.
I. It is single membrane bound cell organelle.
II. Enzymes of this cell organelle resorbed the tail of tadpole during metamorphosis.

Options

A. The cell organelle is formed by the joint activity of ER and Golgi apparatus.
B. The cell organelle is present in almost all the animal cells except mature mammalian RBCs.
C. The cell organelle is equally abundant in plant and animal cells.
D. Both (a) and (b)

Explanation

To solve the question, we need to identify the cell organelle based on the given features and select the correct option regarding it. Let's break down the features provided:

### Step-by-Step Solution:

1. **Identify the Characteristics**:
- The organelle is described as a **single membrane-bound** cell organelle.
- It has enzymes that **resorb the tail of a tadpole during metamorphosis**.

2. **Analyze the First Characteristic**:
- A **single membrane-bound** organelle suggests that it is not a double-membrane organelle like the nucleus or mitochondria. This points towards organelles such as lysosomes or vesicles.

3. **Analyze the Second Characteristic**:
- The function of **resorbing the tail of a tadpole** during metamorphosis is a specific function associated with lysosomes. During metamorphosis, lysosomes contain enzymes that break down and recycle cellular components, which includes the tail of the tadpole.

4. **Conclusion on the Organelle**:
- Based on the characteristics, the organelle in question is likely a **lysosome**.

5. **Evaluate the Options**:
- **Option A**: This organelle is formed by the joint activity of the endoplasmic reticulum and Golgi apparatus. This statement is true for lysosomes.
- **Option B**: This organelle is present in almost all animal cells except mammalian red blood cells. This statement is also true for lysosomes.
- **Option C**: The organelle is equally abundant in plant and animal cells. This statement is false because lysosomes are more abundant in animal cells.
- **Option D**: A and B are correct. This option is correct.

### Final Answer:
The correct organelle is **lysosome**, and the correct option is **D (A and B are correct)**.