Question

1. how does paragraph 25 contribute to the development of the ideas presented in the article?

a. it demonstrates that the use of human embryos represents a very small sub - section of stem cell research.
b. it proves that stem cell therapies are not worth objecting to since we are still so far from being able to use them in human patients.
c. it shows that many researchers are unfairly dismissive of legitimate ethical concerns.
d. it advances the idea that the potential pros of stem cell research outweigh the cons.

Explanation:

To answer this, one would need to analyze Paragraph 25 in the context of the article's overall ideas. If the paragraph shows that human - embryo use is a small part of stem - cell research, it contributes to the understanding of the scope of the research. Option A seems to be a valid interpretation if the paragraph indeed presents such information. Options B, C, and D would require different content in the paragraph to be correct. For example, B would need evidence about the in - feasibility for human use, C would need mention of researchers' dismissal of ethical concerns, and D would need a comparison of pros and cons.

Answer:

A. It demonstrates that the use of human embryos represents a very small sub - section of stem cell research.