1. SCIENCE ... cannot define sexual morality.
2. SCIENCE ... cannot make moral decisions on the embryo’s right to life.
But actually, science can: it's called Ethics, https://en.wikipedia.org/wiki/Ethics. Kant introduced some interesting concepts how to think about what should be morally right, see Deontology.
More interesting though for me here is why these two? It seems to me that these two are among the most controversial of JWs versus the rest of the world, so to speak.
1. RELIGION ... wants control over intimate relationships
2. RELIGION ... wants as many members as possible.