I don’t think it’s insane, it’s just how is humans are. I don’t think it’s nice. I was very aware about the situation as a whole, bit it’s what people have been doing for years, like years and years. It’s kinda human nature
Answer:
1.A tissue is a collection of similar cells that work together to perform a specific job.
An organ is a collection of different tissues that work together to perform a specific job. The function of a part of an organism is what it actually does (it's job)
2.The structure of the alveoli as a web of blood vessels surrounding an air sac allows blood cells take in oxygen and bring it into the lungs (organ)
It is Big Bang and cannot be proved. A hypotheses must be testable. Big Bang is not testable.
