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 determine which points Darwin believed in, we can analyze each statement provided in the question:

1. **Each organism has an internal vital force that tends to increase the size up to a certain limit.**
- Darwin did not believe in an internal vital force. He emphasized that changes in size and traits are due to genetic variations and mutations rather than an inherent force.

2. **Variation appears due to change in genetic makeup.**
- While Darwin acknowledged that variation is essential for natural selection, he believed that variations could arise from both genetic factors and environmental influences. However, he did not attribute all variations solely to environmental changes.

3. **Organs put to more use will develop more, while organs not being used begin to degenerate.**
- This statement reflects Lamarckian ideas rather than Darwin's. Darwin recognized that while some traits may become more pronounced due to use, many organs that are not used do not necessarily degenerate, as evidenced by vestigial structures like the appendix.

4. **All living cells produce minute particles which pass into germ cells for transmission of offspring.**
- This statement aligns with Darwin's views. He believed in the inheritance of traits through gametes, which carry genetic information from parents to offspring.

Based on this analysis, the correct statement that aligns with Darwin's beliefs is the fourth one: **"All living cells produce minute particles which pass into germ cells for transmission of offspring."**

### Step-by-Step Solution:
1. **Analyze each statement**: Review each point to see if it aligns with Darwin's theories.
2. **Identify misconceptions**: Recognize that some statements reflect outdated or incorrect ideas (like the internal vital force and Lamarckian inheritance).
3. **Focus on genetic transmission**: Understand that Darwin emphasized the role of genetic inheritance in evolution.
4. **Conclude with the correct statement**: Determine that the fourth statement is the one Darwin would agree with.