Answer:After puffing off its outer layers, the star collapses to form a very dense white dwarf. One teaspoon of material from a white dwarf would weigh up to 100 tonnes. Over billions of years, the white dwarf cools and becomes invisible.
Explanation: googel hope it helps
Answer:
A creates the fluid in semen
Answer:
I wish I could help but do not understand one bit like I am lost right now my brain is dead I can't get one thing you write
Answer:
amino acids can build proteins!
From top to bottom, I believe the answers are:
Biologist
Chemist
Geologist
Hydrologist