Cyanobacteria were very simple organisms and performed were an role in changing Earth's early atmosphere. They carried out photosynthesis to produce the materials they needed to grow. In this process, they release Oxygen which is needed to sustain life on Earth for Humans and other organisms.
The correct answer is b, antigens
Answer:
Marajuana is indeed bad
Explanation:
I think it is bad because it is considered as a drug in stead of a medicine.
Answer:
The sneeze centre sends signals to the parts of your body that need to work together to help you sneeze. Your chest muscles, diaphragm, abdominals, vocal cords and the muscles in the back of your throat all work together to help you expel the irritant. Muscular, immune, nervous, respiratory.
Explanation:
Answer:
through excess us of corbon(ii)oxide emitting product such as charcoal that cause global warming hence depletion of oxygen in air
