Read the following statements and identify the incorrect one .

Options

A. The movements exhibited by macrophages and leucocytes and cytoskeletal elements like microfilaments are examples of the same movement .
B. The activity of muscles located in the reproductive tract is not under the voluntary control of the nervous system .
C. In the muscle fibers which have less quantity of myoglobin, the number of mitochondria as well as sarcoplasmic reticulum is also less.
D. The bones of the limbs along with their girdles constitute appendicular skeleton.

Answer

To solve the question, we need to analyze each statement provided and identify the incorrect one. Here’s a step-by-step breakdown:

### Step 1: Analyze the First Statement
**Statement:** "The movement exhibited by macrophages leukocyte cytoskeleton elements like microfilaments are example of the same movement."

- **Analysis:** This statement is correct. Macrophages and leukocytes exhibit amoeboid movement, which is facilitated by the cytoskeleton, particularly microfilaments that help in pseudopodia formation.

### Step 2: Analyze the Second Statement
**Statement:** "The activities of muscles located in the reproductive tract are not in the voluntary control of the nervous system. This type of muscles are called involuntary muscles."

- **Analysis:** This statement is also correct. The muscles in the reproductive tract are indeed involuntary and are not under conscious control.

### Step 3: Analyze the Third Statement
**Statement:** "In the muscle fiber which has less quantity of myoglobin, the number of mitochondria as well as sarcoplasmic reticulum is also less."

- **Analysis:** This statement is incorrect. While it is true that white muscle fibers (which have less myoglobin) have fewer mitochondria, the sarcoplasmic reticulum is actually well-developed in these fibers. Therefore, this statement does not accurately represent the characteristics of muscle fibers.

### Step 4: Analyze the Fourth Statement
**Statement:** "The bones of limb along with their girdles constitute a pendicular skeleton."

- **Analysis:** This statement is correct. The bones of the limbs and their girdles do indeed make up the appendicular skeleton.

### Conclusion
After analyzing all the statements, the incorrect statement is the third one.

### Final Answer:
The incorrect statement is: "In the muscle fiber which has less quantity of myoglobin, the number of mitochondria as well as sarcoplasmic reticulum is also less."

---