The Catholic Church does not dictate what Catholics must believe about creation. If Catholics wish to believe in a literal interpretation of Genesis, they may. If they wish to believe that God set in motion the creation process with the 'Big Bang' and evolution, they may also do so. However, whatever they believe, they must remember that God initiated the process and keeps all things in existence.
No, Catholics believe that God creates every soul out of nothing at the moment of conception.
Catholics do not have a separate definition for life, they believe the same thing as science, a new life begins as soon as an egg is fertilized with a sperm.
The pope is the best person to believe what the 'Catholics' should believe but not necessarily what ALL christians should believe. It really is a matter of personal opinion. The Pope acts as a connection between all Catholics/Christians on earth and to help them to lead a good and fulfilled life so he knows what he is talking about.
According to some Astrobiologist, the primodial pond forming bubbles triggered the life on Mother Earth.
Interesting is an opinion but the earth is useful for forming life.
Catholics believe its the cross. Celtic eternal life tattoo is a Celtic spiral.
Roman Catholics believe we do not have the right to take away one's life.
Catholics believe that all life is sacred and oppose unnecessary wars.
Earth
Earth Science I believe
No one really knows. Those who believe in an afterlife would say yes, those who do not would believe that life will end with the earth.
They do not think plant life 'came' to Earth. They believe it evolved here.