In which of these points did Darwin believe?

Options

A. Every organism has an internal vital force that tends to increase its size up to a certain limit.
B. Variations appear due to change in genetic make up
C. The organs put to more use will develop more while organs not used begin to degenerate.
D. All living cells produce minute particles which pass into germ cells for transmission to the offspring.

Answer

To solve the question "In which of these points did Darwin believe?", we need to analyze each of the provided statements and determine which aligns with Darwin's theories, particularly the theory of natural selection.

### Step-by-Step Solution:

1. **Evaluate Statement 1**:
- "Every organism has an internal vital force that tends to increase its size up to a certain limit."
- This statement does not align with Darwin's theory. Darwin did not propose that organisms have a vital force; rather, he focused on natural selection and adaptation.

**Hint**: Consider whether Darwin attributed changes in organisms to an internal force or to environmental pressures.

2. **Evaluate Statement 2**:
- "Variations appeared due to change in the genetic makeup."
- This statement is consistent with Darwin's beliefs. Darwin acknowledged that variations among individuals are crucial for natural selection. These variations arise from genetic differences, especially during reproduction.

**Hint**: Think about how genetic variation contributes to the survival and reproduction of organisms in changing environments.

3. **Evaluate Statement 3**:
- "The organs put to more use will develop while organs not used will begin to degenerate."
- This statement reflects Lamarck's theory of use and disuse, not Darwin's. Darwin did not support the idea that organs develop based on usage; instead, he focused on natural selection.

**Hint**: Distinguish between Lamarck's ideas and Darwin's theory regarding how traits are passed on and developed.

4. **Evaluate Statement 4**:
- "All living cells produce minute particles which pass into germ cells for transmission to the offspring."
- This statement refers to the mutation theory proposed by Hugo de Vries, which is not part of Darwin's original theory. Darwin did not discuss the concept of minute particles in this context.

**Hint**: Consider whether Darwin's theory included the concept of particles or mutations as a means of inheritance.

### Conclusion:
After evaluating all the statements, the only point that aligns with Darwin's beliefs is **Statement 2**: "Variations appeared due to change in the genetic makeup." Therefore, the correct answer is **option number two**.