Answer:
The partial pressure of oxygen is high in the alveoli and low in the blood of the pulmonary capillaries
<span>Simple.
All of the millions of different life forms (the diversity of life) have come about by natural selection, whereby random mutations in the genes have either succeeded or failed.
But all life can be traced back to a common single-celled origin. Thus we have the unity of life where we (possibly) share more than 50 % of our DNA with a crocodile.eg:analogous organs, homologous organs.</span>
Enzymes are proteins and they control the speed of chemical reactions in your body. Without them, the reactions would happen too slowly to keep you alive.
Some break down larger molecules into smaller ones and those enzymes are in your stomach.
C. Bleach. Cleans stuff out of everything
There is a backup system that your body uses to create ATP, and it is called Anaerobic Respiration.
