Answer:
A and C
Explanation:
IM pretty sure anyway i just finished up my biology so im not 100% sure but i know it has to do with ammonia and nitrite or nitrate so thats my best guess.
1. B
2. B
3. A
Sorry if any of these are wrong
C
1. A massive star depletes its nuclear fuel; gravity overpowers the star; supernova occurs; core of star collapses
2. black hole; gravitational pull
3. The center of the Milky Way
1AA:0Aa:3aa
can i have brainly pls
