Oxygen
During aeroobic respiration oxigen reacts with sugar or glucose, producing carbon dioxide, water, and energy.
During anaerobic respiration when there is not enough oxygen, cells break down glucose into lactic acid and energy.
Answer:
the discoveries, events and people that continue to affect the history ... The extremely infectious disease was class-blind, killing rich and ... that a few cells remaining in Petri dishes could be used as biological weaponry. ... smallpox, a disease that had now been killing unhindered for at least 2,800 years.
Explanation:
Answer:
A because it is geneticly passed down
Only 10% of the energy from prey is passed on to the higher trophic levels of the food chain.
U can do it your self its a cross word for crying out loud