Answer:
The same person before to blood if you have a brother and sister to sure when people have blood it's hard for its .
Answer:
based on the graph the most common gas in the atmosphere would be nitrogen
If it killed the top level of an ecosystem it would damage the whole ecosystem because it's connected. An organism depends on that top organism which would mean that is that organism dies it would affect the organism that depends on it.
The first stage of cellular respiration is glycolysis. It does not require oxygen. During glycolysis, one glucose molecule is split into two pyruvate molecules, using 2 ATP while producing 4 ATP and 2 NADH molecules.