Answer: What roses are the best flowers is a non-scientific question.
Explanation: What flower is better is determined by personal opinion. I might think the red roses are prettier and you might think the white ones are. Where all the other questions can be tested all equally and it is not an opinion.
Electron cloud modle should be the answer
If you look at Cosmos episode 1, I'm sure you find an answer there.
Answer:
D
Explanation:
It is often like this: cell->tissue->organ->system
